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01-01-2023
Business

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CNNBC recently reported that the mean annual cost of auto insurance is 1018 dollars. Assume the standard deviation is 268 dollars, and the cost is normally distributed. You take a simple random sample of 39 auto insurance policies. Round your answers to 4 decimal places.
What is the distribution of X? X ~ N(
What is the distribution of ¯x? ¯x~ N(
What is the probability that one randomly selected auto insurance is more than $1038?
a simple random sample of 39 auto insurance policies, find the probability that the average cost is more than $1038.
For part d), is the assumption of normal necessary? NoYes

Answer :

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