In a normal distribution, 99% of the measurements fall within:
A) 1% of the mean.
B) 5% of the mean.
C) plus or minus one standard deviation of the mean.
D) plus or minus two standard deviations of the mean.
E) plus or minus three standard deviations of the mean.

Question

Quizplus · Accepted Answer

In a normal distribution, approximately 99.7% of the data falls within three standard deviations of the mean, so 99% is very close to this range, making option E the most accurate.

In a Normal Distribution, 99% of the Measurements Fall Within