a) Use a 1% level of significance to test whether the mean duration of incoming calls to the store had changed. b) Construct the 95% confidence interval for the population mean duration of the incoming calls to the furniture store.
a) Use a 1% level of significance to test whether the mean duration of incoming calls to the store had changed. b) Construct the 95% confidence interval for the population mean duration of the incoming calls to the furniture store.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 30PPS
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In 2002, the average duration of incoming telephone calls to a furniture store was 9.4 minutes. The manager wants to perform a test to determine whether this average duration of incoming calls has changed. Twenty calls to the store was randomly selected and the
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a) Use a 1% level of significance to test whether the mean duration of incoming calls to the store had changed.
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b) Construct the 95% confidence interval for the population mean duration of the incoming calls to the furniture store.
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