In a random sample of seven people, the mean driving distance to work was 20.2 miles and the standard deviation was 5.8 miles. Assuming the population is normally distributed and using the t-distribution, a 99% confidence interval for the population mean μ is (12.1, 28.3) (and the margin of error is 8.1). Through research, it has been found that the population standard deviation of driving distances to work is 4.3. Using the standard normal distribution with the appropriate calculations for a standard deviation that is known, find the margin of error and construct a 99% confidence interval for the population mean μ. Interpret and compare the results. Question content area bottom Part 1 Identify the margin of error. enter your response here ▼ square miles miles per hour miles (Round to one decimal place as needed.) Part 2 Construct a 99% confidence interval for the population mean. (enter your response here,enter your response here) (Round to one decimal place as needed.) Part 3 Interpret the results. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) A. With enter your response here% confidence, it can be said that most driving distances to work (in miles) in the population are between the interval's endpoints. B. enter your response here% of all random samples of seven people from the population will have a mean driving distance to work (in miles) that is between the interval's endpoints. C. With enter your response here% confidence, it can be said that the population mean driving distance to work (in miles) is between the interval's endpoints. D. It can be said that enter your response here% of the population has a driving distance to work (in miles) that is between the interval's endpoints. Part 4 Compare these results to the results that used the t-distribution. The new confidence interval is ▼ narrower than as wide as wider than the confidence interval that used the t-distribution and has ▼ the same a greater a lesser center.
In a random sample of seven people, the mean driving distance to work was 20.2 miles and the standard deviation was 5.8 miles. Assuming the population is normally distributed and using the t-distribution, a 99% confidence interval for the population mean μ is (12.1, 28.3) (and the margin of error is 8.1). Through research, it has been found that the population standard deviation of driving distances to work is 4.3. Using the standard normal distribution with the appropriate calculations for a standard deviation that is known, find the margin of error and construct a 99% confidence interval for the population mean μ. Interpret and compare the results. Question content area bottom Part 1 Identify the margin of error. enter your response here ▼ square miles miles per hour miles (Round to one decimal place as needed.) Part 2 Construct a 99% confidence interval for the population mean. (enter your response here,enter your response here) (Round to one decimal place as needed.) Part 3 Interpret the results. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) A. With enter your response here% confidence, it can be said that most driving distances to work (in miles) in the population are between the interval's endpoints. B. enter your response here% of all random samples of seven people from the population will have a mean driving distance to work (in miles) that is between the interval's endpoints. C. With enter your response here% confidence, it can be said that the population mean driving distance to work (in miles) is between the interval's endpoints. D. It can be said that enter your response here% of the population has a driving distance to work (in miles) that is between the interval's endpoints. Part 4 Compare these results to the results that used the t-distribution. The new confidence interval is ▼ narrower than as wide as wider than the confidence interval that used the t-distribution and has ▼ the same a greater a lesser center.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
In a random sample of
mean driving distance to work was
normally distributed and using the t-distribution, a
seven
people, the 20.2
miles and the standard deviation was
5.8
miles. Assuming the population is 99%
confidence interval for the population mean
μ
is
(12.1, 28.3)
(and the margin of error is
8.1).
Through research, it has been found that the population standard deviation of driving distances to work is
4.3.
Using the standard normal distribution with the appropriate calculations for a standard deviation that is known, find the margin of error and construct a
99%
confidence interval for the population mean
μ.
Interpret and compare the results.Question content area bottom
Part 1
Identify the margin of error.
enter your response here
▼
square miles
miles per hour
miles
(Round to one decimal place as needed.)
Part 2
Construct a
99%
confidence interval for the population mean.(enter your response here,enter your response here)
(Round to one decimal place as needed.)
Part 3
Interpret the results. Select the correct choice below and fill in the answer box to complete your choice.
(Type an integer or a decimal. Do not round.)
With
enter your response here%
confidence, it can be said that most driving distances to work (in miles) in the population are between the interval's endpoints.enter your response here%
of all random samples of
seven
people from the population will have a mean driving distance to work (in miles) that is between the interval's endpoints.With
enter your response here%
confidence, it can be said that the population mean driving distance to work (in miles) is between the interval's endpoints.It can be said that
enter your response here%
of the population has a driving distance to work (in miles) that is between the interval's endpoints.Part 4
Compare these results to the results that used the t-distribution.
The new confidence interval is
the confidence interval that used the t-distribution and has
center.
▼
narrower than
as wide as
wider than
▼
the same
a greater
a lesser
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