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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

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

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 94E
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Question 10 Check Answer esc. ▼ Formulas: np; √√np(1-p) ; Here is the quick link to the scientific calculator, and from there, you may navigate to any online statistics calculators using the "Content" tab on the upper-left-hand side. ! < 1 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. 30 F1 > 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? p(1 - p) n @ 2 F2 σ √n ; #3 80 F3 Yes No $ DS 4 a F4 % 5 9 F5 MacBook Air ^ 6 F6 & 7
Transcribed Image Text:Question 10 Check Answer esc. ▼ Formulas: np; √√np(1-p) ; Here is the quick link to the scientific calculator, and from there, you may navigate to any online statistics calculators using the "Content" tab on the upper-left-hand side. ! < 1 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. 30 F1 > 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? p(1 - p) n @ 2 F2 σ √n ; #3 80 F3 Yes No $ DS 4 a F4 % 5 9 F5 MacBook Air ^ 6 F6 & 7
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