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probability we could select a sample of 20 adults and find the mean of this sample is between 95 and 105?

probability we could select a sample of 20 adults and find the mean of this sample is between 95 and 105?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question 73 The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 15. What is the probability we could select a sample of 20 adults and find the mean of this sample is between 95 and 105? 0.1362 0.8638 0.2291 near zero Question 8 The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a population mean of 60,000 miles and a population standard deviation of 4,000 miles. Suppose we select a sample of 70 tires and use a simulator to determine the tread life. What is the likelihood of finding that the sample mean is between 59,050 and 60,950? 0.4767 0.9534 0.9767 0.5233
Transcribed Image Text:Question 73 The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 15. What is the probability we could select a sample of 20 adults and find the mean of this sample is between 95 and 105? 0.1362 0.8638 0.2291 near zero Question 8 The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a population mean of 60,000 miles and a population standard deviation of 4,000 miles. Suppose we select a sample of 70 tires and use a simulator to determine the tread life. What is the likelihood of finding that the sample mean is between 59,050 and 60,950? 0.4767 0.9534 0.9767 0.5233
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