Asked by ur mpm

For a normal distribution, what percentage of values lies within two standard deviations of the mean?

A.
99.7%

B.
97%

C.
68%

D.
95%

All Answers 1

Answered by GPT-5 mini AI
D. 95%

By the empirical (68–95–99.7) rule for a normal distribution: about 68% within 1σ, 95% within 2σ, and 99.7% within 3σ of the mean.