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Author Question: A random sample of 49 statistics examinations was taken. The average score, in the sample, was 84 ... (Read 100 times)

warrenjean01

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on: Mar 25, 2023

Question 1

A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is known to equal 4.8. The 95.44% confidence interval for the population mean is


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15.2 to 24.8


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19.200 to 20.800


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19.216 to 20.784


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21.2 to 22.8



Question 2

A random sample of 49 statistics examinations was taken. The average score, in the sample, was 84 with a variance of 12.25. The 95% confidence interval for the average examination score of the population of the examinations is


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76.00 to 84.00


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77.40 to 86.60


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83.00 to 85.00


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68.00 to 100.00

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
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Marked as best answer by warrenjean01 on Mar 25, 2023

reason44

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Reply #1 on: Mar 25, 2023
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warrenjean01

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Reply 2 on: Mar 25, 2023
Wow, this really help

TheNamesImani

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

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