CNNBC recently reported that the mean annual cost of auto insurance is 959 dollars. Assume the standard deviation is 198 dollars. You will use a simple random sample of 150 auto insurance policies....

CNNBC recently reported that the mean annual cost of auto insurance is 959 dollars. Assume the standard deviation is 198 dollars. You will use a simple random sample of 150 auto insurance policies.


Find the probability that a single randomly selected policy has a mean value between 941.2 and 989.7 dollars.


P(941.2
X
< 989.7)="">



Find the probability that a random sample of size n=150 has a mean value between 941.2 and 989.7 dollars.


P(941.2
M
< 989.7)="">