CNNBC recently reported that the mean annual cost of auto insurance is 1038 dollars. Assume the standard

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CNNBC recently reported that the mean annual cost of auto insurance is 1038 dollars. Assume the standard deviation is 229 dollars, and the cost is normally distributed. You take a simple random sample of 18 auto insurance policies.Round your answers to 4 decimal places.

What is the distribution ofX?X~ N(,)
What is the distribution ofX?X~ N(,)
What is the probability that one randomly selected auto insurance is more than $1101?
a simple random sample of 18 auto insurance policies, find the probability that the average cost is more than $1101.
For part d), is the assumption of normal necessary?

Posted Date: May 19, 2024 03:04 PM

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CNNBC recently reported that the mean annual cost of auto insurance is 1038 dollars. Assume the standard

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