In developing an interval estimate for a population mean,the population standard deviation σ was assumed to be 10.The interval estimate was 50.92 ± 2.14.Had σ equaled 20,the interval estimate would be

A) 60.92 ± 2.14
B) 50.92 ± 12.14
C) 101.84 ± 4.28
D) 50.92 ± 4.28

Population Standard Deviation

Measures the dispersion of a set of data points in a population from its mean, indicating how spread out the data points are.

Interval Estimate

An estimate of a population parameter that provides a range of values believed to contain the parameter with a certain level of confidence.

Population Mean

The average of a set of values, taken from the entire population of data.