CNNBC recently reported that the mean annual cost of auto insurance is 968 dollars. Assume the standard deviation is 259 dollars, and the cost is normally distributed. You take a simple random sample of 36 auto insurance policies. Round your answers to 4 decimal places. a. What is the distribution of X? X - N( 968 259 b. What is the distribution of ? T - N( 968 c. What is the probability that one randomly selected auto insurance is less than $1015? 43.1667 0.5720 d. a simple random sample of 36 auto insurance policies, find the probability that the average cost is less than $1015. 0,8619 e. For part d), is the assumption of normal necessary? O Yeso No

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