In the expression D) -1 and -10 are both extraneous solutions.
What is expression?
Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. Unknown variables, integers, and arithmetic operators are the components of an algebraic expression. There are no symbols for equality or inequality in it.
The given logarithmic expression is
=> log(-x)+log(x+11) = 1 .
Here the given expression solution is -1 and -10.
Now put x=-1 into given expression then,
=> log(-(-1))+log(-1+11) =1
=> log(1)+log(10) =1
=> 0+1=1
=> 1=1
Then -1 is extraneous solution.
Now put x=-10 then,
=> log(-1(-10))+log(-10+11)=1
=> log(10)+log(1)=1
=> 1+0=1
=> 1=1
Then x=-10 is also extraneous solution.
Hence the correct option is D) -1 and -10 are both extraneous solutions.
To learn more about expression refer the below link
https://brainly.com/question/112703
#SPJ1
Please help me with this and show step by step solution, thank you all help is useful!
The distance between the intersection and the bank is equal to 77.0 feet.
What are the properties of similar triangles?In Mathematics, two (2) triangles are said to be similar when the ratio of their corresponding side lengths are equal and their corresponding angles are congruent.
Additionally, the lengths of corresponding sides are proportional to the lengths of corresponding altitudes when two (2) triangles are similar.
Note: Let the distance between the intersection and the bank be represented by the variable x.
By applying the properties of similar triangles, we have the following ratio of corresponding side lengths;
x/50 = 382/248
248x = 382(50)
x = 19,100/248
x = 77.0 feet.
Read more on triangle here: brainly.com/question/22891315
#SPJ1
Complete Question:
The intersection of the two roads shown forms two similar triangles. If AC is 382 feet, MP is 248 feet, and the gas station is 50 feet from the intersection, how far from the intersection is the bank?
Gina sees that there is a 30% chance of rain each day during her Spring Break. She ran 10 different simulations using a random number generator to find the probability that it would rain on at least two days during her Spring Break. In the table below, the digits 7, 8, and 9 represent a day with rain and 0 through 6 represent days with no rain.
PLEASE HELP FOR 20 POINTS
Answer:
88
Step-by-step explanation:
^9199eoijdfwieufhiqehgfb
Please answer asap!!
The function f(x) = sec(x) has no x-intercepts.
The y-intercept of the graph of f(x) = sec(x) is (0, 1).
Graph of a Trigonometric functionFrom the question, we are to identify any x-intercepts and y-intercepts of the graph of f(x) = sec(x).
The function f(x) = sec(x) is defined as the reciprocal of the cosine function, that is:
f(x) = 1 / cos(x)
The cosine function has a zero at x = π/2 + nπ, where n is an integer.
At these values of x, the denominator of the secant function becomes zero, and the function becomes undefined.
Therefore, the function f(x) = sec(x) has no x-intercepts.
To find the y-intercept, we need to evaluate the function at x = 0, which gives:
f(0) = 1 / cos(0) = 1 / 1 = 1
Hence, the y-intercept of the graph of f(x) = sec(x) is (0, 1).
The graph of the function f(x) = sec(x) is shown below.
Learn more on Graph of a Trigonometric function here: https://brainly.com/question/31249124
#SPJ1
What is the effect on the graph of the function f(x) = x² when it is transformed to
create the graph of h(x) = 1/5 f(x)?
The transformation performed on f(x) = x² to create h(x) = 1/5f(x) is the graph is compressed horizontally by the factor 1/5
What is transformation?Transformations are mathematical operations performed on a graph or function to change the shape, size or orientation of the graph or function.
Given that we have the function f(x) = x² and it is transformed into the graph h(x) = 1/5f(x).
We see that the transformation performed on f(x) to convert it to h(x) is dilation since it is multiplied by a factor less than 1. Since it it multiplied by a factor less than 1, f(x) is compressed horizontally by the factor 1/5 to give h(x)So, the graph is compressed horizontally by the factor 1/5
Learn more about transformation here:
https://brainly.com/question/28025572
#SPJ1
The expected value of the number of points for one roll is:_____.a. 0 b. 1 c. 3 d. 6
Answer:
2023- answer is A-0
Step-by-step explanation:
the sum of shannon and john’s ages is 70 shannon is 4 times as old as john
How would you solve for m<ACD
The measure of angle ACD is approximately 109.5 degrees.
What are parallel lines ?
Parallel lines can be defined in which the lines which are equidistant to each other and they never intersect.
To solve for m<ACD, we can use the fact that the sum of the angles in a triangle is 180 degrees.
We can start by finding the measure of angle ACD, which is opposite to the known side length of 10 units. Using the Law of Cosines, we have:
cos(ACD) = (AD * AD + CD * CD - 100) / (2 * AD * CD)
We know that AD = 8 units and CD = 6 units, so plugging in these values, we get:
cos(ACD) = (64 + 36 - 100) / (2 * 8 * 6) = -1/3
Since -1/3 is negative, we know that angle ACD is obtuse, meaning it measures between 90 and 180 degrees. Therefore, we can take the inverse cosine of -1/3 to find its measure:
cos(ACD) = (-1/3) ≈ 109.5 degrees
Therefore, the measure of angle ACD is approximately 109.5 degrees.
To learn more about Parallel lines from given link.
https://brainly.com/question/29762825
#SPJ1
Morgan is practicing kicking field goals for her high school football team. She knows that the field goal is 16 feet off the ground.
Part A: If she stands 30 feet from the field goal, how far must she kick the ball in order to make the extra point?
Part B: Explain how you arrived at your conclusion IWILL GIVE 83 POINTS
Answer:
Part A:
Assuming that Morgan kicks the ball at an angle that will allow it to clear the crossbar, we can use the following formula to determine how far she must kick the ball:
Distance = Height / tan(θ)
where θ is the angle at which the ball is kicked.
Since the field goal is 16 feet off the ground and we want the ball to clear the crossbar, we can assume that Morgan needs to kick the ball at an angle of approximately 45 degrees. Therefore, plugging in the given values, we get:
Distance = 16 / tan(45)
Simplifying the equation, we get:
Distance = 16 / 1
Therefore, Morgan must kick the ball a distance of 16 feet to make the extra point if she stands 30 feet from the field goal.
Part B:
To arrive at this conclusion, we used the formula for the distance of a projectile when given the initial velocity, angle, and height of the object. However, since we were not given the initial velocity, we assumed that Morgan would need to kick the ball at an angle of approximately 45 degrees to clear the crossbar. This is a common assumption in football, as it allows for the ball to travel the farthest distance possible while still clearing the crossbar. Additionally, we assumed that there was no wind or other external factors that could affect the trajectory of the ball. With these assumptions, we were able to determine that Morgan would need to kick the ball a distance of 16 feet to make the extra point if she stood 30 feet from the field goal.
if we take a simple random sample from a normal distribution, the probability that the sample mean is equal to the population mean is 1 (i.e., 100%). radio button unchecked false radio button unchecked true submit
The given statement "if we take a simple random sample from a normal distribution, the probability that the sample mean is equal to the population mean is 1 (i.e., 100%)" is false.
The probability that a sample mean is equal to the population mean is actually zero, since any given sample will differ slightly from the population mean due to sampling error. However, as the sample size increases, the sample mean is likely to be close to the population mean, and the probability of it being equal approaches 1 (i.e., 100%).
To explain further, the population mean is the mean of the entire population and is calculated by adding up all the values of the population and dividing them by the total number of individuals in the population. A sample mean, on the other hand, is the mean of a sample taken from the population and can be calculated by adding up the values of the sample and dividing them by the total number of individuals in the sample. Since the sample size is usually smaller than the population size, the sample mean is likely to be slightly different from the population mean due to sampling error.
For more such questions on Probability.
https://brainly.com/question/30653447#
#SPJ11
a new state employee is offered a choice of seven basic health plans, four dental plans, and two vision care plans. how many different health-care plans are there to choose from if one plan is selected from each category?
There are 56 different health-care plans to choose from if one plan is selected from each category.
To calculate the total number of different health-care plans, we need to multiply the number of options in each category.
Number of basic health plans = 7
Number of dental plans = 4
Number of vision care plans = 2
Using the multiplication principle of counting, the total number of different health-care plans is:
7 x 4 x 2 = 56
Therefore, there are 56 different health-care plans to choose from if one plan is selected from each category.
Learn more about Multiplication Principle:
https://brainly.com/question/3618797
#SPJ4
A one-to-one function is given. Write an expression for the inverse function. f(x)=√x+7 Select one: O af¹¹(x)=x²-7 Ob. f¹(x)=(x-7)³ O c.f¹(x) = (x + 7)³ O d. f¹(x)=x³ +7
The correct option B. The expression for the inverse is f¹(x) = (x - 7)².
A one-to-one function is given. We have to write an expression for the inverse function.
Given function: f(x)=√x+7
The inverse of a function is found by switching the x and y coordinates and solving for y.
So, the expression for the inverse function will be:
f¹(x) = y = √x + 7 ... (1)
Replace x with y and simplify to isolate y from the radical.
y = √x + 7
=> y - 7 = √x
=> (y - 7)² = x
Hence, the inverse of the given function is given byf¹(x) = (x - 7)².
So, the correct option is B) f¹(x)=(x-7)².
To learn more about functions: https://brainly.com/question/1719822
#SPJ11
QUESTION 8
In the figure to the right, AB is parallel to CD.
What is the value of m?
A. 7°
B. 44°
C. 46°
D. 49°
Answer: B. 44°
if i'm wrong then its C
dr. smith analyzed the types of information sources used by their students in their literature reviews. all the charts and graphs below depict this data, but which is the best one to represent this data?
a census reports that the mean retirement age is 68.3 years. in a random sample, the mean retirement age is 65.8 years. what is the mean of 68.3 years?
The mean retirement age in the census report is 68.3 years.
The given information states that the population mean retirement age is 68.3 years, and a random sample of retirement age has a sample mean of 65.8 years. We can use this information to estimate the population mean with a certain level of confidence.
However, the question asks us to find the mean of 68.3 years, which is simply the given population mean. Therefore, we can state that the mean of 68.3 years remains the same, as it is not affected by the sample mean or any other sample statistic.
In other words, the population mean of 68.3 years is a fixed value, and it does not change based on the sample mean or any other sample statistic. Therefore, we can simply state that the mean retirement age is 68.3 years, which is the given information provided in the question.
You can learn more about random sample at
https://brainly.com/question/29348144
#SPJ11
what polynomial has a graph that passes through the given points? (-4,89),(-3,7),(-1,-1),(1,-1),(4,329)
The polynomial (D) y = x4 + 2x3 – 3x2 – 2x + 1 has the graph that passes through the points (–4, 89), (–3, 7), (–1, –1), (1, –1), (4, 329) respectively.
What is a polynomial?A polynomial is a mathematical statement made up of coefficients and indeterminates that uses only the operations addition, subtraction, multiplication, and powers of positive integers of the variables.
A polynomial is a mathematical equation that solely uses the operations addition, subtraction, multiplication, and non-negative integer exponentiation of variables.
Variables are sometimes known as indeterminates in mathematics.
x² 4x + 7 is an illustration of a polynomial with a single indeterminate x.
So, substitution and trial-and-error are the best ways to solve this problem given the various points and equations that are available as options.
In this regard, we change the equations' examples from 4 to x and see which one produces 89. The solution is D.
Therefore, the polynomial (D) y = x4 + 2x3 – 3x2 – 2x + 1 has the graph that passes through the points (–4, 89), (–3, 7), (–1, –1), (1, –1), (4, 329) respectively.
Know more about polynomials here:
https://brainly.com/question/2833285
#SPJ1
Complete question:
What polynomial has a graph that passes through the given points? (–4, 89), (–3, 7), (–1, –1), (1, –1), (4, 329)
a)y = 2x3 – 3x2 – 2x + 1
b)y = 1x4 – 2x3 – 3x2 + 2x + 1
c)y = x4 – 2x3 + 3x2 + 2x – 1.
d)y = x4 + 2x3 – 3x2 – 2x + 1
John, Glenn, and Brian often eat out together.1. Each person orders either coffee or tea.2. If John orders coffee then Glenn orders the drink that Brian orders.3. If Glenn orders coffee, John orders the drink that Brian doesn't order.4. If Brian orders tea then John orders the drink that Glenn orders.Based on the information which person orders the same drink every time.
Glenn orders the same drink every time. This can be answered by the Simple intelligence.
The logic behind this conclusion is as follows:
John orders coffee: In this case, Glenn must order the same drink as Brian. According to statement 2, if John orders coffee, Glenn orders the drink that Brian orders. Therefore, Glenn's drink choice is dependent on Brian's choice and not consistent.Glenn orders coffee: In this case, John must order the opposite drink as Brian. According to statement 3, if Glenn orders coffee, John orders the drink that Brian doesn't order. Therefore, John's drink choice is also dependent on Brian's choice and not consistent.Brian orders tea: In this case, John must order the same drink as Glenn. According to statement 4, if Brian orders tea, John orders the drink that Glenn orders. However, Glenn's choice is not dependent on Brian's choice, so Glenn will always order the same drink. Therefore, Glenn is the only person who orders the same drink every time.
Therefore, Glenn orders the same drink every time.
To learn more about Simple intelligence here:
brainly.com/question/9691088#
#SPJ11
Peter bought 100 shares of stock for $6.35 per share last year. He paid his broker a 2% commission. He sold the stock this week for $12.57 per share and paid his broker a $15 flat fee. What were Luis’s net proceeds?
The net proceeds for Luis would be amount $1,169.50. This is calculated by subtracting the cost of the stock (100 x $6.35 = $635) and the commission (2% of $635 = $12.70) from the sale of the stock (100 x $12.57 = $1,257) and subtracting the flat fee of $15. ($1,257 - $635 - $12.70 - $15 = $1,169.50).
The net proceeds for Luis from the sale of the stock were calculated by subtracting the cost of the stock, the commission fee, and the flat fee from the proceeds of the sale. The cost of the stock was 100 shares at $6.35 per share, which totaled amount $635. The commission fee was 2% of the cost of the stock, which was $12.70. The flat fee was a set fee of $15. The proceeds from the sale of the stock was 100 shares at $12.57 per share, which totaled $1,257. The net proceeds for Luis was calculated by subtracting the cost of the stock, the commission fee, and the flat fee from the proceeds of the sale, which was $1,257 - $635 - $12.70 - $15 = $1,169.50.
Learn more about amount here
https://brainly.com/question/8082054
#SPJ1
probability sampling procedures are question 13 options: a) instances where every unit in the population has a non-zero chance of being selected b) every possible answer is correct c) typically used when population parameters are known to exist d) certain to eliminate random sample error
Probability sampling procedures are instances where every unit in the population has a non-zero chance of being selected. (Option a)
Probability sampling is a type of sampling method used in statistical analysis, where each member of the population has a known and equal probability of being selected. This means that every possible unit in the population has a non-zero chance of being selected for the sample.
Probability sampling methods include simple random sampling, systematic sampling, stratified sampling, and cluster sampling. These methods are typically used when population parameters are unknown or when the researcher wants to make generalizations about the population based on the sample data.
Learn more about Probability Sampling:
https://brainly.com/question/28016369
#SPJ4
stemjock in each of problems 18 through 22, use the method of reduction of order to find a second solution of
Using the method of reduction of order, you can find a second solution to Problems 18-22.
In this method, we assume the second solution will have the same form as the first one, but with different constants of integration. To find the second solution, we substitute the first solution into the differential equation and solve for the remaining constant.
To illustrate, let's say Problem 18 is:
$$y''-2y'+y = 0$$
We start with a first solution of the form: $y_1=e^rx$.
Substituting this into the differential equation, we get:
$$r^2e^rx -2re^rx+e^rx=0$$
Rearranging and dividing by $e^rx$ yields:
$$r^2 -2r+1=0$$
Using the quadratic formula, we find two possible solutions for $r$:
$r=1$ and $r=-1$
Using these two values for $r$, we can write our two solutions as:
$y_1 = e^x$ and $y_2 = e^{-x}$
This same method can be applied to Problems 19-22 to find the second solution.
For more such questions on Reduction of order.
https://brainly.com/question/30872273#
#SPJ11
A $12 box of chocolate on sale for 20% off. What is the sale price
A box of chocolate on sale for 20% means that 80% of its original value remain.
Therefore, the sale price of the box of chocolate = $12 x 80% = $9.6
The sales price of box of chocolates is 9.6 dollars.
Given that, a $12 box of chocolate on sale for 20% off.
A sale price is the discounted price at which goods or services are being sold.
Here, sales price = Original price - 20% of Original price
= 12 - 20% of 12
= 12 - 20/100 ×12
= 12 - 0.2×12
= 12 - 2.4
= $9.6
Therefore, the sales price of box of chocolates is 9.6 dollars.
Learn more about the sale price here:
brainly.com/question/29199569.
#SPJ6
Geometry, Help Please hurry!!!
In the diagram, ABCD is Similar EFGH. Find the following,
4. Scale Factor
5. EH
6. AB
Scale Factor is equal to [tex]\frac{2}{3}[/tex]. Length of EH is equal to 16 units and length of AB is equal to 9.
4. A scale factor is the ratio of the scales of an original object and a new object.
Scale factor = Ordinated dimension / original dimension
Scale factor = [tex]\frac{10}{15}[/tex]
Scale factor = [tex]\frac{2}{3}[/tex] (or) 0.67
5. Length of EH
Scale factor = [tex]\frac{EH}{AD}[/tex]
[tex]\frac{EH}{AD}[/tex] = [tex]\frac{2}{3}[/tex]
[tex]\frac{EH}{24} = \frac{2}{3}[/tex]
EH = 2 * 8
EH = 16 units
6. Length of AB
Scale factor = [tex]\frac{EF}{AB}[/tex]
[tex]\frac{EF}{AB}[/tex] = [tex]\frac{2}{3}[/tex]
[tex]\frac{6}{AB} = \frac{2}{3}[/tex]
AB = 3 * 3
AB = 9 units.
Therefore, Scale Factor is equal to [tex]\frac{2}{3}[/tex]. Length of EH is equal to 16 units and length of AB is equal to 9.
Learn more about Scale Factor:
https://brainly.com/question/30215119
#SPJ1
a doctor prescribes 3 g of a drug, daily, for a patient. the pharmacist has only 750 mg tablets available. how many tablets will the patient take daily?
The patient needs to take 4 tablets daily to receive the prescribed dose of 3 grams of the drug.
To determine how many tablets the patient needs to take daily, we need to divide the total amount of the drug prescribed by the dose of each tablet.
Since the patient is prescribed 3 grams of the drug daily, we first need to convert this to milligrams (mg), as the tablets are available in milligram form.
1 gram = 1000 milligrams, so 3 grams = 3,000 milligrams
The pharmacist has 750 mg tablets available, so we can calculate the number of tablets the patient needs to take daily by dividing the prescribed dose by the dose of each tablet:
Number of tablets = Prescribed dose ÷ Dose per tablet
Number of tablets = 3,000 mg ÷ 750 mg
Number of tablets = 4
Therefore, the patient needs to take 4 tablets daily to receive the prescribed dose of 3 grams of the drug.
Therefore, the patient will take 4 tablets daily.
Learn more about medication dosage calculation:https://brainly.com/question/24793154
#SPJ11
true or falsea linear system is ill-conditioned if its solution is highly sensitive to small changes in the problem data
In the following question, A linear system is ill-conditioned if its solution is highly sensitive to small changes in the problem data is said to be True.
What is a linear system? In mathematics, a linear system refers to a system of linear equations that can be expressed in matrix form as Ax = b. A is a matrix, x is a vector, and b is a constant vector. When working with linear systems, we must keep track of the numerical accuracy of the computations. When a small change in the matrix or constant vector produces a large change in the solution, the matrix is said to be ill-conditioned.
The mathematical concept of condition numbers measures the sensitivity of a matrix to changes in the problem data. If a matrix has a high condition number, it is said to be ill-conditioned, whereas if it has a low condition number, it is said to be well-conditioned. An ill-conditioned matrix is difficult to solve numerically because a small error in the input data can produce a large error in the computed solution.
Therefore, the statement that "a linear system is ill-conditioned if its solution is highly sensitive to small changes in the problem data" is correct, and it is true.
For more such questions on linear system
https://brainly.com/question/2030026
#SPJ11
A cylinder has a height of 15 in and a radius of 9 in. Round to the nearest tenth
From the given information provided, the surface area and volume of cylinder is 1130.97 and 3816.85 respectively.
To find the surface area and volume of the cylinder, we can use the following formulas:
Surface Area = 2πr² + 2πrh
Volume = πr²h
Substituting the given values, we get:
Surface Area = 2π(9)² + 2π(9)(15) = 1130.97 square inches (rounded to the nearest tenth)
Volume = π(9)²(15) = 3816.85 cubic inches (rounded to the nearest tenth)
Therefore, the surface area of the cylinder is approximately 1130.97 square inches, and the volume is approximately 3816.85 cubic inches, both rounded to the nearest tenth.
Question - A cylinder has a height of 15 in and a radius of 9 in. Find area and volume. Round to the nearest tenth.
Learn more about volume here: brainly.com/question/12410983
#SPJ4
suppose you draw a card from the deck, put it aside without looking at it, and draw another card. what is the probability that the second card is an ace?
The probability of drawing a second card as an ace after drawing one card and putting it aside without looking at it depends on the outcome of the first draw and whether the card was replaced or not.
The possibility of drawing an ace from a general deck of 52 playing cards is 4/52, or 1/13. But, the probability of drawing an ace as the second card relies upon whether or not the first card drawn turned into an ace or now not, in addition to whether the first card was replaced lower back into the deck or no longer.
If the primary card becomes an ace and it was now not replaced, then there are only three aces left inside the deck out of fifty-one cards, so the opportunity of drawing another ace as the second card could be 3/51.
However, if the primary card becomes an ace and it is turned into changed, then the opportunity of drawing any other ace as the second one card would nonetheless be 4/52, or 1/13 because the deck could be efficiently reset.
Then again, if the primary card was now not an ace, then there might be 4 aces left inside the deck out of fifty-one cards. Consequently, the opportunity of drawing an ace as the second card could be 4/51.
In precis, the opportunity of drawing a 2nd ace from a well-known deck of cards could rely on the outcome of the primary draw and whether the cardboard was replaced or no longer.
Learn more about probability at
brainly.com/question/30034780
#SPJ4
Find the measure of the indicated angle to the nearest degree.
8)
7)
28
25
I
Find the area of each.
9)
5m
6.7 m
10)
8 km
46
9.6 km
22
The given angles and measures is given below:
What is an Angle?In mathematics and geometry, an angle is a measure of the space between two intersecting lines, rays, or line segments, usually expressed in degrees, radians, or grads. It is the measure of the opening between two lines that intersect at a common point, called the vertex of the angle.
5) tan x = 153 / 41
x = tan^-1 ( 153 / 41 )
75 degrees
6) tan y = 25/25
y = tan^-1 ( 25/25 )
45 degrees
7) sin z = 10/28
z= sin^-1 ( 10/28 )
21 degrees
8) cos a = 47/50
a = cos^-1( 47/50)
20 degrees
Read more about angles here:
https://brainly.com/question/25716982
#SPJ1
Please help with 18! :)
Answer:
x = -13
Step-by-step explanation:
x+[tex]\frac{x+2}{3}[/tex]=-8
Step 1- You multiply both sides by 3
x + x + 2= -24
2x + 2 = -24
Step 2- You then minus 2 from both sides
2x = -26
Lastly, you divide both sides by 2
x = -13
And there you go!
Viola
Hope this helped
find the degrees of freedom and the critical value t* that you would use for a confidence interval for a population mean in each of the following settings. a) an 80% confidence interval based on a random sample of 25 observations. b) a 98% confidence interval from an srs of 55 observations.
a) The degree of freedom for a sample size 25 is equals to the 24 and the critical value t* for 80% confidence interval and degree of freedom 24 is equals to 1.318.
b) The degree of freedom for a sample size 55 is equals to the 54 and the critical value t* for 98% confidence interval and degree of freedom 54 is equals to 2.403.
The t-distribution has a bell-shaped density curve but has more variance (spread) than a normal bell curve.
Degrees of freedom: The degrees of freedom of a t-distribution is represented by n−1 for a sample of size n.critical value: The critical t-value for a confidence level c and sample size n is obtained by following below steps,Step 1: First express the confidence level as a number (in decimal) c with 0<c<1.
Step 2: Determine the significance level, denoted
α, by α = 1 − c.
Step 3: Use the t-distribution table to obtain the t-score (critical value) tα/2 where (i) the α is from Step 2 and (ii) the degrees of freedom equals n−1, where n is the sample size.
a) 80% of confidence interval and observation of
Sample size, n = 25
From above definition, degree of freedom= n - 1 = 25 - 1 = 24 and c = 80%
= 0.80
Significance level, α = 1- c = 1 - 0.80 = 0.20
and α/2 = 0.10 then use the t-table the critical t-value for this 80% confidence interval, t₀.₁₀ = 1.711.
b) 98% confidence interval with 55 observations. So, Sample size, n = 55
degree of freedom = n - 1 = 55 - 1 = 54,
c = 98% = 0.98
Significance level, α = 1-0.98 = 0.02
and α/2 = 0.01, then use the t-table the critical t-value for this 98% confidence interval, t₀.₀₁ = 2.669
Hence required value is 2.669.
For more information about critical t-value, visit :
https://brainly.com/question/27192813
#SPJ4
what effect does increasing the sample size, n, have on the center of the sampling distribution of sample means?
Increasing the sample size leads to a more accurate estimation of the population mean.
What is Probability ?
Probability can be defined as ratio of number of favourable outcomes and total number outcomes.
As the sample size, n, increases, the center of the sampling distribution of sample means becomes more precise and closer to the true population mean. This is known as the central limit theorem, which states that as the sample size increases, the distribution of sample means becomes approximately normal with a mean equal to the population mean and a standard deviation equal to the population standard deviation divided by the square root of the sample size.
In other words, as we take larger and larger samples, we are more likely to obtain sample means that are closer to the true population mean. This is because larger samples are less affected by random fluctuations and more likely to provide a representative picture of the population as a whole.
Therefore, increasing the sample size leads to a more accurate estimation of the population mean.
To learn more about Probability from given link.
brainly.com/question/30034780
#SPJ1
does the line ever match up perfectly? can the lines ever have the same slope? can the lines ever have the same y-intercept? why or why not?
No, the lines cannot ever match up perfectly because there is always some sort of difference between them. The lines can have the same slope if they have the same change in y-values for a given change in x-values. The lines can also have the same y-intercept if they cross the y-axis at the same point.
No, there will never be a perfect alignment between the lines since there will always be a discrepancy of some kind. However, the lines can have the same slope and y-intercept. This is possible because the slope and y-intercept are determined by the equation of the line, and if two lines have the same equation, then they will have the same slope and y-intercept.
If the lines intersect the y-axis at the same location, they can also have the same y-intercept. This means that the two lines have the same value of b in the equation y = mx + b. This means that the two lines have the same slope and the same y-intercept.
To learn more about equation of the line link is here
brainly.com/question/21511618
#SPJ4