A used car dealer says that the mean price of a three-year-old sports utility vehicle is $22,000. You suspect this claim is incorrect and find that a random sample of 20 similar vehicles has a mean price of $22,711 and a standard deviation of $1990. Is there enough evidence to reject the claim at a = 0.05? Complete parts (a) through (e) below. Assume the population is normally distributed. (d) Decide whether to reject or fail to reject the null hypothesis. OA. Fail to reject Ho because the test statistic is not in the rejection region(s). B. Reject Ho because the test statistic is in the rejection region(s). OC. Fail to reject Ho because the test statistic is in the rejection region(s). O D. Reject Ho because the test statistic is not in the rejection region(s).
A used car dealer says that the mean price of a three-year-old sports utility vehicle is $22,000. You suspect this claim is incorrect and find that a random sample of 20 similar vehicles has a mean price of $22,711 and a standard deviation of $1990. Is there enough evidence to reject the claim at a = 0.05? Complete parts (a) through (e) below. Assume the population is normally distributed. (d) Decide whether to reject or fail to reject the null hypothesis. OA. Fail to reject Ho because the test statistic is not in the rejection region(s). B. Reject Ho because the test statistic is in the rejection region(s). OC. Fail to reject Ho because the test statistic is in the rejection region(s). O D. Reject Ho because the test statistic is not in the rejection region(s).
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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Transcribed Image Text:K
A used car dealer says that the mean price of a three-year-old sports utility
vehicle is $22,000. You suspect this claim is incorrect and find that a random
sample of 20 similar vehicles has a mean price of $22,711 and a standard
deviation of $1990. Is there enough evidence to reject the claim at a = 0.05?
Complete parts (a) through (e) below. Assume the population is normally
distributed.
(d) Decide whether to reject or fail to reject the null hypothesis.
OA. Fail to reject Ho because the test statistic is not in the
rejection region(s).
B. Reject Ho because the test statistic is in the rejection region(s).
4
OC. Fail to reject Ho because the test statistic is in the
rejection region(s).
D. Reject Ho because the test statistic is not in the rejection region(s).
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