Citrus F v is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage uver the years for Citrus cars has been about 1600 miles per month. Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 21 recent mileages of Citrus cars was taken. The mean of these 21 mileages was 1553 miles per month, and the standard deviation was 241 miles per month. Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.05 level of significance, can it be concluded that the mean recent monthly mileage, u, of Citrus cars is less than 1600 miles per month? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) |(a) State the null hypothesis H, and the alternative hypothesis H1. H, :0 H :0 |(b) Determine the type of test statistic to use. (Choose one) ▼ (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the critical value. (Round to three or more decimal places.) (e) At the 0.05 level of significance, can it be concluded that the mean recent
Citrus F v is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage uver the years for Citrus cars has been about 1600 miles per month. Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 21 recent mileages of Citrus cars was taken. The mean of these 21 mileages was 1553 miles per month, and the standard deviation was 241 miles per month. Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.05 level of significance, can it be concluded that the mean recent monthly mileage, u, of Citrus cars is less than 1600 miles per month? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) |(a) State the null hypothesis H, and the alternative hypothesis H1. H, :0 H :0 |(b) Determine the type of test statistic to use. (Choose one) ▼ (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the critical value. (Round to three or more decimal places.) (e) At the 0.05 level of significance, can it be concluded that the mean recent
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Problem 1P
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Transcribed Image Text:Citrus F v is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly
mileage uver the years for Citrus cars has been about 1600 miles per month.
Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this,
a random sample of 21 recent mileages of Citrus cars was taken. The mean of these 21 mileages was 1553 miles per month, and the standard deviation was
241 miles per month.
Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.05 level of significance, can it be concluded that the mean
recent monthly mileage, u, of Citrus cars is less than 1600 miles per month?
Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.)
(a) State the null hypothesis H, and the alternative hypothesis H,.
Ho :0
H, :0
(b) Determine the type of test statistic to use.
(Choose one) ▼
(c) Find the value of the test statistic. (Round to three or more decimal places.)
(d) Find the critical value. (Round to three or more decimal places.)
(e) At the 0.05 level of significance, can it be concluded that the mean recent
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