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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 42 times)

Mscarter

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on: Mar 25, 2023

Question 1

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.  The standard error of the mean is


◦

450


◦

81


◦

500


◦

50



Question 2

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.  At 95% confidence, the size of the margin of error is


◦

1.96


◦

50


◦

98


◦

42

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

kaelamcrone

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Reply #1 on: Mar 25, 2023
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Mscarter

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Reply 2 on: Mar 25, 2023
Gracias!

coreycathey

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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