Asked Jan 24, 2020

A confidence interval for a population mean has a margin of error of 10.7.

a. Obtain the length of the confidence interval.
b. If the mean of the sample is 75.2, determine the confidence interval.
c. Express the confidence interval in the form “point estimate ± margin of error.”


Expert Answer

Step 1

From the given question,

It is given that a confidence interval for a population mean has a margin of error of 10.7.

That is, E = 10.7.


The required length of the confidence interval can be expressed or calculated as:

Statistics homework question answer, step 1, image 1
Step 2


The confidence interval can be computed as:

Here, mean of...

Statistics homework question answer, step 2, image 1

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