The empirical rule states that, for data having a bell-shaped distribution, the percentage of data values being within one standard deviation of the mean is approximately
A) 25%.
B) 50%.
C) 68%.
D) 95%.

Question

Quizplus · Accepted Answer

The empirical rule (also known as the 68-95-99.7 rule) states that approximately 68% of the data values fall within one standard deviation of the mean in either direction. Therefore, choice C is the best answer.

The Empirical Rule States That, for Data Having a Bell-Shaped