Author Question: A random sample of 49 statistics examinations was taken. The average score, in the sample, was 84 ... (Read 91 times)

warrenjean01 · **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

reason44 · **Reply #1 on:** Mar 25, 2023

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