In developing an interval estimate for a population mean,the population standard deviation $\text { ? }$
was assumed to be 10.The interval estimate was 50.92 $\pm$ 2.14.Had $\text { ? }$
equaled 20,the interval estimate would be:
A) 60.92 $\pm$ 2.14.
B) 50.92 $\pm$ 12.14.
C) 101.84 $\pm$ 4.28.
D) 50.92 $\pm$ 4.28.

Question

In developing an interval estimate for a population mean,the population standard deviation $\text { ? }$
 was assumed to be 10.The interval estimate was 50.92 $\pm$ 2.14.Had $\text { ? }$
 equaled 20,the interval estimate would be:
A) 60.92 $\pm$ 2.14.
B) 50.92 $\pm$ 12.14.
C) 101.84 $\pm$ 4.28.
D) 50.92 $\pm$ 4.28.

Quizplus · Accepted Answer

The interval estimate depends on the standard deviation. Doubling $\sigma$ from 10 to 20 would double the margin of error from 2.14 to 4.28, but the center of the interval, 50.92, remains unchanged.

In Developing an Interval Estimate for a Population Mean,the Population ? \text { ? } ?

In Developing an Interval Estimate for a Population Mean,the Population $\text { ? }$