An industrial psychologist consulting with a chain of music stores knows that the average number of complaints management receives each month throughout the industry is 120, but the variance is unknown. Eight of the chain's stores were randomly selected to record complaints for one month; they received 60, 120, 110, 80, 70, 90, 100, and 130. complaints. Using the .05 significance level, is the number of complaints received by the chain lower than the number of complaints received by music stores in general? a.) Carry out a t test for a single sample using the .05 significance level. Use the five steps of hypothesis testing. Label all the steps clearly. Show ALL work/calculations. b.) Report the statistic in APA format (the statistical sentence). c.) Additionally, explain what you did to a person who is familiar with hypothesis testing with a known population variance and a single sample (z-test), but knows nothing about t-tests of any kind (for example, you do not need to describe the steps or logic of hypothesis testing). Be sure you explain how this problem differs from a problem with a known population variance and a single sample (a z-test). Your answer should consist mainly of a thorough explanation of the characteristics of the comparison distribution and all the figuring you did to determine those characteristics.
An industrial psychologist consulting with a chain of music stores knows that the average number of complaints management receives each month throughout the industry is 120, but the variance is unknown. Eight of the chain's stores were randomly selected to record complaints for one month; they received 60, 120, 110, 80, 70, 90, 100, and 130. complaints. Using the .05 significance level, is the number of complaints received by the chain lower than the number of complaints received by music stores in general? a.) Carry out a t test for a single sample using the .05 significance level. Use the five steps of hypothesis testing. Label all the steps clearly. Show ALL work/calculations. b.) Report the statistic in APA format (the statistical sentence). c.) Additionally, explain what you did to a person who is familiar with hypothesis testing with a known population variance and a single sample (z-test), but knows nothing about t-tests of any kind (for example, you do not need to describe the steps or logic of hypothesis testing). Be sure you explain how this problem differs from a problem with a known population variance and a single sample (a z-test). Your answer should consist mainly of a thorough explanation of the characteristics of the comparison distribution and all the figuring you did to determine those characteristics.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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Transcribed Image Text:An industrial psychologist consulting with a chain of music stores knows that the average number of
complaints management receives each month throughout the industry is 120, but the variance is
unknown. Eight of the chain's stores were randomly selected to record complaints for one month;
they received 60, 120. 110, 80, 70, 90, 100, and 130. complaints. Using the .05 significance level, is
the number of complaints received by the chain lower than the number of complaints received by
music stores in general?
a.) Carry out a t test for a single sample using the .05 significance level. Use the five steps of
hypothesis testing. Label all the steps clearly. Show ALL work/calculations.
b.) Report the statistic in APA format (the statistical sentence).
c.) Additionally, explain what you did to a person who is familiar with hypothesis testing with a
known population variance and a single sample (z-test), but knows nothing about t-tests of any kind
(for example, you do not need to describe the steps or logic of hypothesis testing). Be sure you
explain how this problem differs from a problem with a known population variance and a single
sample (a z-test). Your answer should consist mainly of a thorough explanation of the characteristics
of the comparison distribution and all the figuring you did to determine those characteristics.
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