E(7) = (to 1 decimal) (to 4 decimals) = 20

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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Barron's reported that the average number of weeks an individual is unemployed is 19.5 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is
19.5 weeks and that the population standard deviation is 6 weeks. Suppose you would like to select a random sample of 65 unemployed individuals for a follow-up study. Use z-table.
a. Show the sampling distribution of T, the sample mean average for a sample of 65 unemployed individuals.
E(7) =
(to 1 decimal)
(to 4 decimals)
Transcribed Image Text:Barron's reported that the average number of weeks an individual is unemployed is 19.5 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is 19.5 weeks and that the population standard deviation is 6 weeks. Suppose you would like to select a random sample of 65 unemployed individuals for a follow-up study. Use z-table. a. Show the sampling distribution of T, the sample mean average for a sample of 65 unemployed individuals. E(7) = (to 1 decimal) (to 4 decimals)
b. What is the probability that a simple random sample of 65 unemployed individuals will provide a sample mean within 1 week of the population mean?
(to 4 decimals)
Transcribed Image Text:b. What is the probability that a simple random sample of 65 unemployed individuals will provide a sample mean within 1 week of the population mean? (to 4 decimals)
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