A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 23 similar vehicles has a mean price of $21,702 and a standard deviation of $1976. Is there enough evidence to reject the claim at a = 0.10? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify H0 and H1 Determine the degrees of freedom d.f. Find the standardized test statistic t. Determine the sample mean and standard deviation. Decide whether to reject or fail to reject the null hypothesis. Interpret the decision in the context of the original claim.
A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 23 similar vehicles has a mean price of $21,702 and a standard deviation of $1976. Is there enough evidence to reject the claim at a = 0.10? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify H0 and H1 Determine the degrees of freedom d.f. Find the standardized test statistic t. Determine the sample mean and standard deviation. Decide whether to reject or fail to reject the null hypothesis. Interpret the decision in the context of the original claim.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 23 similar vehicles has a mean price of $21,702 and a standard deviation of $1976. Is there enough evidence
to reject the claim at a = 0.10? Complete parts (a) through (e) below. Assume the population is normally distributed.
(a) Write the claim mathematically and identify H0 and H1
Determine the degrees of freedom d.f.
Find the standardized test statistic t.
Determine the sample mean and standard deviation.
Decide whether to reject or fail to reject the null hypothesis.
Interpret the decision in the context of the original claim.
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