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Drew Kidd Drew Kidd
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2 weeks ago
The following table shows the wait time on the phone, in minutes, of six individuals who require assistance from a customer service representative.



Test the hypothesis that the standard deviation of wait time for all customers waiting for a representative for this company is less than 4.0 minutes using α = 0.05.
Textbook 

Business Statistics


Edition: 2nd
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gymnasticsxogymnasticsxo
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More questions for this book are available here
Calculate the sample variance.


Because χ2 = 4.00 is more than  = 1.145 for a lower-tail test, we fail to reject the null hypothesis. We do not have enough evidence to conclude that the standard deviation of wait time for all customers waiting for a representative for this company is less than 4.0 minutes.

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