CNNBC recently reported that the mean annual cost of auto insurance is 977 dollars. Assume the standard deviation is 252 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( b. What is the distribution of ? - N c. What is the probability that one randomly selected auto insurance is less than $1020? d. a simple random sample of 36 auto insurance policies, find the probability that the average cost is less than $1020. e. For part d), is the assumption of normal necessary? No Yes
CNNBC recently reported that the mean annual cost of auto insurance is 977 dollars. Assume the standard deviation is 252 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( b. What is the distribution of ? - N c. What is the probability that one randomly selected auto insurance is less than $1020? d. a simple random sample of 36 auto insurance policies, find the probability that the average cost is less than $1020. e. For part d), is the assumption of normal necessary? No Yes
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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