Question

A 95% confidence interval is found to be (28, 32). The sample standard deviation is 7 and the sample size is 49. If you wanted a smaller interval, what could you do?

C. Increase sample size to 64

Answer 1

See below

Explanation:

If we increase the sample size, we will decrease the margin of error, creating a smaller interval. This is why option C is the most appropriate answer!