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Author Question: After computing a confidence interval, the user believes the results are meaningless because the ... (Read 60 times)

elarge

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on: Mar 25, 2023

Question 1

A sample of 225 elements from a population with a standard deviation of 75 is selected. The sample mean is 180. The 95% confidence interval for μ is


◦

105.0 to 225.0


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175.0 to 185.0


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100.0 to 200.0


◦

170.2 to 189.8



Question 2

After computing a confidence interval, the user believes the results are meaningless because the width of the interval is too large. Which one of the following is the best recommendation?


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Increase the level of confidence for the interval.


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Decrease the sample size.


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Increase the sample size.


◦

Reduce the population variance.

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

delmiss

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Reply #1 on: Mar 25, 2023
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elarge

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Reply 2 on: Mar 25, 2023
Great answer, keep it coming :)

T4T

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Reply 3 on: Yesterday
Wow, this really help

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