Question

a population characteristic is normally distributed. approximately what percentage of the population lies within two standard deviations of the mean?
a. 48%
b. 68%
c. 95%
d. 99%

Explanation:

Step1: Recall empirical rule

For a normal - distribution, about 68% of the data lies within 1 standard deviation of the mean, about 95% lies within 2 standard deviations of the mean, and about 99.7% lies within 3 standard deviations of the mean.

Answer:

C. 95%