CNNBC recently reported that the mean annual cost of auto insurance is 1050 dollars. Assume the standard deviation is 211 dollars, and the cost is normally distributed. You take a simple random sample of 12 auto insurance policies. Round your answers to 4 decimal places. a. What is the distribution of X? X - N( b. What is the distribution of ? - N( c. What is the probability that one randomly selected auto insurance is more than $1072? d. a simple random sample of 12 auto insurance policies, find the probability that the average cost is more than $1072. e. For part d), is the assumption of normal necessary? Yes No Check Answer

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