A certain brand of tire advertises an average of 40,000 miles of tread wear before replacement. An auto magazine will do an article on the tire. They sample 48 tires and the average tread wear before replacement was 39,800 miles with a standard deviation of 2,000 miles. As we do not know if the actual average is higher or lower than 40,000, we will do a two-tailed test at the 5% significance level. Give the hypotheses.
A certain brand of tire advertises an average of 40,000 miles of tread wear before replacement. An auto magazine will do an article on the tire. They sample 48 tires and the average tread wear before replacement was 39,800 miles with a standard deviation of 2,000 miles. As we do not know if the actual average is higher or lower than 40,000, we will do a two-tailed test at the 5% significance level. Give the hypotheses.
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.3: The Natural Exponential Function
Problem 44E
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Question 18: give the rejection region.
Transcribed Image Text:Give the rejection region.
z greater than 1.96
z less than -1.96
z less than -1.96 or z greater than 1.96.
z less than -0.69.
Transcribed Image Text:A certain brand of tire advertises an average of 40,000 miles of
tread wear before replacement. An auto magazine will do an
article on the tire. They sample 48 tires and the average tread
wear before replacement was 39,800 miles with a standard
deviation of 2,000 miles. As we do not know if the actual
average is higher or lower than 40,000, we will do a two-tailed
test at the 5% significance level.
Give the hypotheses.
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