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Author Question: Exhibit 8-4In order to estimate the average electric usage per month, a sample of 81 houses was ... (Read 48 times)

mccallkeeler

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on: Mar 25, 2023

Exhibit 8-4
In order to estimate the average electric usage per month, a sample of 81 houses was selected, and the electric usage was determined.  Assume a population standard deviation of 450-kilowatt hours.


Refer to Exhibit 8-4.  If the sample mean is 1,858 KWH, the 95% confidence interval estimate of the population mean is


◦

1,760 to 1,956 KWH


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1,858 to 1,956 KWH


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1,760 to 1,858 KWH


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none of these alternatives is correct

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
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Marked as best answer by mccallkeeler on Mar 25, 2023

kuttz

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Reply #1 on: Mar 25, 2023
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mccallkeeler

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Reply 2 on: Mar 25, 2023
:D TYSM

mcabuhat

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Reply 3 on: Yesterday
Wow, this really help

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