In developing an interval estimate for a population mean, the interval estimate was 62.84 to 69.46. The population standard deviation was assumed to be 6.50, and a sample of 100 observations was used. The mean of the sample was:
A)56.34.
B)62.96.
C)13.24.
D)66.15.

Question

Quizplus · Accepted Answer

The interval estimate is the sample mean plus or minus the margin of error. The midpoint of the interval (62.84 + 69.46) / 2 = 66.15, which is the sample mean.

In Developing an Interval Estimate for a Population Mean, the Interval