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Name: A leasing firm claims that the mean number of miles driven annually in
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Description: A leasing firm claims that the mean number of miles driven annually in it's leased cars is less than 12,900 miles. A random sample is 50 cars leased from this firm had a mean of 11,704 annual miles driven. It is known that the population standard dev

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A leasing firm claims that the mean number of miles driven annually in it's leased cars is less than 12,900 miles. A random sample is 50 cars leased from this firm had a mean of 11,704 annual miles driven. It is known that the population standard deviation of the number of miles driven in cars from this firm is 3320 miles. Is there support for the firm's claim at the 0.05 level of significance?

Perform a one tailed test, then complete the parts below.

Carry computations to 3 or more decimal places.

(a) State the null hypothesis H, and the alternative hypothesis H,.
H,:
H
(b) Determine the type of test statistic to use.
() 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) Can we support the leasing firm's claim that the mean number of miles
driven annually is less than 12,900 miles?
OYes
No

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