In an experiment designed to enhance IQ with a sample size of 25, where population mean for IQ is 100, what would be considered a statistically insignificant sample mean IQ?
A)99
B)110
C)95
D)105

Question

Quizplus · Accepted Answer

A 99 is a statistically insignificant mean, because it is less than one standard error away from the population mean; the standard error of the mean in this study is 3. 110 is the most statistically significant result of these options; it is more than three standard error units away from the mean.

In an Experiment Designed to Enhance IQ with a Sample