A simple random sample with n=56 provided a sample mean of n= 23.5 and a sample...

A simple random sample with n=56 provided a sample mean of n= 23.5 and a sample standard deviation of 4.3.

a. Develop a confidence interval for the population mean (to 1 decimal).

____,___

b. Develop a confidence interval for the population mean (to 1 decimal).

___,___

c. Develop a confidence interval for the population mean (to 1 decimal).

___, ___

d. What happens to the margin of error and the confidence interval as the confidence level is increased?

- Select your answer -(They increase/They decrease/They stay the same/It cannot be determined from the given data/The margin of error increases and the confidence interval becomes narrower/The margin of error decreases and the confidence interval becomes wider) .

Expert Solution

orchestra answered 2 years ago

A simple random sample with n=56 provided a sample mean of 23.5 and a sample standard...

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