For the normal distribution, the mean plus and minus 1.96 standard deviations will include what percent of the observations?
A) 84%
B) 90%
C) 95%
D) 97%

Question

Quizplus · Accepted Answer

This rule is based on the empirical rule for a normal distribution, which states that approximately 95% of the data falls within two standard deviations of the mean. When we add and subtract 1.96 standard deviations from the mean, we end up with a range that captures approximately 95% of the data.

For the Normal Distribution, the Mean Plus and Minus 1