The number of traffic accidents per day on a certain section of highway is thought to be distributed with a mean equal to 2.19. What is the standard deviation of the number of accidents?
A) approximately 4.80
B) 3.14
C) 2.19
D) approximately 1.48

Question

Quizplus · Accepted Answer

The standard deviation of the distribution can be found using the square root of the mean, which is approximately 1.48. Therefore, the correct choice is D.

The Number of Traffic Accidents Per Day on a Certain