Question

about what percentage of the data lies within 2 standard deviations of the mean in a normal distribution?
47.5%
68%
95%
99.7%

Explanation:

Step1: Recall empirical rule

The empirical rule for a normal distribution states certain percentages of data within specific standard - deviation ranges.

Step2: Identify percentage for 2 standard deviations

According to the empirical rule, about 95% of the data lies within 2 standard deviations of the mean in a normal distribution.

Answer:

C. 95%