company says that the mean gas mileage for its luxury sedan is at least 21 miles per hat a random sample of 7 cars has a mean gas mileage of 18 mpg and a standard de Assume the population is normally distributed. here to view the t-distribution table. here to view page 1 of the normal table. here to view page 2 of the normal table. h sampling distribution should be used and why? . Use a normal sampling distribution because the population is normal, and is known. . Use a t-sampling distribution because n < 30. . Use a normal sampling distribution because the population is normal, and is unknown. the appropriate hypotheses to test. - Ho: με 21 H₂:μ>21 H₂:#21 H₂:μ=21 OB. Use a t-san is normal, a OD. Use a norm OF. Use a t-sar is normal, OB. Ho: H=21 H₂:μ#21 O D. Ho: μ²21 H₂:μ<21 is the value of the standardized test statistic? standardized test statistic is. (Round to two decimal places as needed.) is the critical value?
company says that the mean gas mileage for its luxury sedan is at least 21 miles per hat a random sample of 7 cars has a mean gas mileage of 18 mpg and a standard de Assume the population is normally distributed. here to view the t-distribution table. here to view page 1 of the normal table. here to view page 2 of the normal table. h sampling distribution should be used and why? . Use a normal sampling distribution because the population is normal, and is known. . Use a t-sampling distribution because n < 30. . Use a normal sampling distribution because the population is normal, and is unknown. the appropriate hypotheses to test. - Ho: με 21 H₂:μ>21 H₂:#21 H₂:μ=21 OB. Use a t-san is normal, a OD. Use a norm OF. Use a t-sar is normal, OB. Ho: H=21 H₂:μ#21 O D. Ho: μ²21 H₂:μ<21 is the value of the standardized test statistic? standardized test statistic is. (Round to two decimal places as needed.) is the critical value?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Related questions
Question

Transcribed Image Text:A car company says that the mean gas mileage for its luxury sedan is at least 21 miles per gallon (mpg). You believe the claim is incorrect and
find that a random sample of 7 cars has a mean gas mileage of 18 mpg and a standard deviation of 5 mpg. At a = 0.05, test the company's
claim. Assume the population is normally distributed.
Click here to view the t-distribution table.
Click here to view page 1 of the normal table.
Click here to view page 2 of the normal table.
Which sampling distribution should be used and why?
O A. Use a normal sampling distribution because the population
is normal, and o is known.
O C.
Use a t-sampling distribution because n < 30.
O E. Use a normal sampling distribution because the population
is normal, and is unknown.
State the appropriate hypotheses to test.
O A. H₂: μ≤21
H₂:μ>21
O C. H₂: μ#21
H₂:μ=21
The critical value is. (Round to three decimal places as needed.)
What is the outcome and the conclusion of this test?
O B. Use a t-sampling distribution because the population
is normal, and σ is unknown.
Ho. At the 5% significance level, there is
mileage for the luxury sedan is at least 21 miles per gallon.
O D.
O F.
Use a normal sampling distribution because n> 30.
Use a t-sampling distribution because the population
is normal, and σ is known.
O B. Ho: p=21
H₂:μ*21
What is the value of the standardized test statistic?
The standardized test statistic is (Round to two decimal places as needed.)
What is the critical value?
D. Ho: μz 21
H₂:μ<21
evidence to
the car company's claim that the mean gas
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