1, If P(A and B) = 0, A and B are mutually exclusive. Otherwise, A and B occur jointly

P(A) =0.400

P(B) =0.300

P(A and B) =0.110

P(C) = 0.200

Compute the probability of event A or B and enter your answer with 3 decimal places.

Answer:

Question 2

For a normal distribution with a mean of 160 and a standard deviation of 39, what is the Z value for a random value to be 172? (Use 2 decimal digits)

Answer:

Question 3

A manufacturing process produces auto tires. A sample of miles at replacement is recorded inDATA. At what mileage should the warranty be set at for warranty replacement of 0.5% of the tires?

A) 45294

B) 41215

C) 47359

D) 39668

Question 4

A sample of 155 randomly selected students, found that the proportion of students planning to travel home for Thanksgiving is 0.66.

What is the standard deviation of the sampling distribution?

Round to 3 decimal digits.

Answer: