Question

Usinh the Empirical Rule in a normal distribution, what percent of the data falls within two standard deviations of the mean?
A. 50%
B. 68%
C. 95%
D. 99.7%

Answer 1

Do you have a guess?

Answer 2

Use a normal distribution table to create the following diagram

and hence deduce the area of the curve between Z=-2 to Z=+2
See:
https://www.math.ucdavis.edu/~morris/MAT135A/materials/standardnormaltable.pdf