The waiting time for customers at Walton Shopping Mall chains follows a normal distribution with a mean of 3 minutes and a standard deviation of 1 minute. At the Brooklyn Mall, the quality-assurance department sampled 50 customers and found that the mean waiting time was 2.75 minutes. At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes? Based on this which of the following is true: Select one: a.H1mu< 3, test value is -1.77 and the critical value is -1.65 b. H1:mu< 3, test value is -1.08 and the critical value is -1.96 C. H1: mu< 3, test value is -1.07 and the critical value is -1.65 d. H1: mu< 2.75, test value is -1.77 and the critical value is -1.65 e. H1:mu> 3, test value is 1.44 and the critical value is 1.65

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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The waiting time for customers at Walton Shopping Mall chains follows a normal distribution with a mean of 3 minutes and a standard deviation of 1 minute. At the
Brooklyn Mall, the quality-assurance department sampled 50 customers and found that the mean waiting time was 2.75 minutes. At the .05 significance level, can
we conclude that the mean waiting time is less than 3 minutes? Based on this which of the following is true:
Select one:
a.H1:mu< 3, test value is -1.77 and the critical value is -1.65
b. H1:mu< 3, test value is -1.08 and the critical value is -1.96
C. H1: mu< 3, test value is -1.07 and the critical value is -1.65
d. H1: mu< 2.75, test value is -1.77 and the critical value is -1.65
e. H1:mu> 3, test value is 1.44 and the critical value is 1.65
Transcribed Image Text:The waiting time for customers at Walton Shopping Mall chains follows a normal distribution with a mean of 3 minutes and a standard deviation of 1 minute. At the Brooklyn Mall, the quality-assurance department sampled 50 customers and found that the mean waiting time was 2.75 minutes. At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes? Based on this which of the following is true: Select one: a.H1:mu< 3, test value is -1.77 and the critical value is -1.65 b. H1:mu< 3, test value is -1.08 and the critical value is -1.96 C. H1: mu< 3, test value is -1.07 and the critical value is -1.65 d. H1: mu< 2.75, test value is -1.77 and the critical value is -1.65 e. H1:mu> 3, test value is 1.44 and the critical value is 1.65
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