CNNBC recently reported that the mean annual cost of auto insurance is 991 dollars. Assume the standard deviation is 206 dollars, and the cost is normally distributed. You take a simple Fandom sample of 38 auto insurance policies. Round your answers to 4 decimal places. a. What is the distribution of X? X - N(

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c. What is the probability that one randomly selected auto insurance is more than $1015?
0.4536
d. a simple random sample of 38 auto insurance policies, find the probability that the average cost is
more than $1015.
e. For part d), is the assumption of normal necessary? No Yes
Transcribed Image Text:c. What is the probability that one randomly selected auto insurance is more than $1015? 0.4536 d. a simple random sample of 38 auto insurance policies, find the probability that the average cost is more than $1015. e. For part d), is the assumption of normal necessary? No Yes
CNNBC recently reported that the mean annual cost of auto insurance is 991 dollars. Assume the standard
deviation is 206 dollars, and the cost is normally distributed. You take a simple random sample of 38 auto
insurance policies. Round your answers to 4 decimal places.
a. What is the distribution of X? X - N
(
Transcribed Image Text:CNNBC recently reported that the mean annual cost of auto insurance is 991 dollars. Assume the standard deviation is 206 dollars, and the cost is normally distributed. You take a simple random sample of 38 auto insurance policies. Round your answers to 4 decimal places. a. What is the distribution of X? X - N (
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