13.7 A sample of young men, continued.  Suppose that the blood cholesterol levels of all men age 20 to 34 years follows the normal distribution with mean miu=188milligrams per decilliter (mg/dl) and standard deviation sigma=41 mg/dl. (a) Choose an SRS of 100 men from this population. Waht is the sampling distribution of xbar? What is the probability that xbar takes a value between 185 and 191 mg/dl? This is the probability that xbar etimates miu within +/-3 mg/dl. (b) Choose an SRS of 1000 men from this population. Now what is the probability that xbar falls within +/-3 mg/dl of miu? The larger sample is much more likely to give an accurate etimate of miu.

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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13.7 A sample of young men, continued. 

Suppose that the blood cholesterol levels of all men age 20 to 34 years follows the normal distribution with mean miu=188milligrams per decilliter (mg/dl) and standard deviation sigma=41 mg/dl.

(a) Choose an SRS of 100 men from this population. Waht is the sampling distribution of xbar? What is the probability that xbar takes a value between 185 and 191 mg/dl? This is the probability that xbar etimates miu within +/-3 mg/dl.

(b) Choose an SRS of 1000 men from this population. Now what is the probability that xbar falls within +/-3 mg/dl of miu? The larger sample is much more likely to give an accurate etimate of miu.

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