Question

question 3 of 10
in a normal distribution, 68% of the data fall within how many standard deviations of the mean?

a. two standard deviations
b. one standard deviation
c. it cannot be determined from the given information.
d. three standard deviations

Explanation:

In a normal distribution, the empirical rule (or 68 - 95 - 99.7 rule) states that approximately 68% of the data lies within 1 standard deviation of the mean, about 95% within 2, and about 99.7% within 3. So for 68% of the data, it's within one standard deviation.

Answer:

B. One standard deviation