Multiple Choice
Solve the problem.
-A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.8 hours. If 40 mechanics are randomly selected,
Find the probability that their mean rebuild time is less than 8.9 hours.
A) 0.4276
B) 0.9608
C) 0.9756
D) 0.9589
Correct Answer:
Verified
Correct Answer:
Verified
Q29: Heights of adult females are normally distributed.
Q49: Solve the problem.<br>-The ages of 30
Q51: If z is a standard normal variable,
Q52: Find the indicated probability.<br>-Assume that the weights
Q53: The normal distribution has a greater percentage
Q55: Estimate the indicated probability by using the
Q56: Solve the problem. Round to the nearest
Q57: Solve the problem.<br>-A poll of 1200 randomly
Q58: A normal quartile plot is given below
Q59: If z is a standard normal variable,