E(7) = (to 1 decimal) (to 4 decimals) = 20
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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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)
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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