Assume that police estimate that 12% of drivers do not wear their seatbelts. They set up a safety roadblock, stopping cars to check for seatbelt use. They stop 50 cars during the first hour. a. Find the mean, variance, and standard deviation of the number of drivers expected not to be wearing seatbelts. Use the fact that the mean of a geometric distribution is μ= 1 p and

mean = 8.33, variance =61.11 , standrad deviation = 7.82

Step-by-step explanation:

For geometric distribution,

Mean =

variance =

Standard deviation , where p = probability of success in each trial.

Given: p= 0.12

Mean =

Variance =

Standard deviation =

Hence,  mean = 8.33, variance =61.11 , standrad deviation = 7.82

based on context clues you gave i'm assuming the answer would be c.

pi or 3.14159265359 is an irratinal decimal