Question

The lengths of a certain species of fish are approximately normally distributed with a given mean (look at the picture) and standard deviation (look at at the picture) . According to the Empirical Rule, what percentage of the fish will have lengths within 1 standard deviation of the mean?

34%
47.5%
68%
99.7%

Answer 1

answer C 68%

Explanation:

none

Answer 2

The empirical rule states that approximately 68/95/99.7% of a normal distribution lies within 1/2/3 standard deviations. So the answer is 68%.