In the EAI sampling problem, the population mean is $71,500 and the population standard deviation is $5000. For n = 30, there is a 0.4908 probability of obtaining a sample mean within ±$600 of the population mean. Use z-table. a. What is the probability that T is within $600 of the population mean if a sample of size 60 is used (to 4 decimals)? b. Answer part (a) for a sample of size 120 (to 4 decimals).

In the EAI sampling problem, the population mean is $71,500 and the population standard deviation is $5000. For n = 30, there is a 0.4908 probability of obtaining a sample mean within ±$600 of the population mean. Use z-table. a. What is the probability that T is within $600 of the population mean if a sample of size 60 is used (to 4 decimals)? b. Answer part (a) for a sample of size 120 (to 4 decimals).

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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