In developing an interval estimate for a population mean,the population standard deviation σ is assumed to be 8.The interval estimate is 45.82 ± 2.36.What will be the interval estimate for the population mean if σ is equal to 16?
A)45.82 ± 4.72
B)45.82 ± 2.36
C)45.82 ± 9.44
D)45.82 ± 5.56

Question

Quizplus · Accepted Answer

Doubling the population standard deviation (σ) from 8 to 16 doubles the margin of error in the interval estimate, resulting in 45.82 ± 4.72.

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