Question

question 2 of 10
in a normal distribution, what percentage of the data falls within 3 standard deviations of the mean?

a. 68%

b. 95%

c. 34%

d. 99.7%

Explanation:

In a normal distribution, the empirical rule (or 68 - 95 - 99.7 rule) states that about 68% of data falls within 1 standard deviation of the mean, about 95% within 2, and about 99.7% within 3 standard deviations of the mean. So the percentage for 3 standard deviations is 99.7%.

Answer:

D. 99.7%