According to the empirical rule, if the data form a "bell-shaped curve" (normal distribution), approximately what percent of the observations will be contained within + /- 2 standard deviations from the arithmetic mean. (Select the correct answer from the choices below.)

A. 99.7

B. 95.0

C. 75.0

D. 68.3

Answer rating: 100% (QA)

B 950 6895997 rule For the normal distribution the valu... View the full answer