An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within 1.4 years of the population mean. Assume the population of ages is normally distributed. (a) Determine the minimum sample size required to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.6 years. (b) The sample mean is 20 years of age. Using the minimum sample size with a 90% level of confidence, does it seem likely that the population mean could be within 9% of the sample mean? within 10% of the sample mean? Explain. Click here to view page 1 of the Standard Normal Table. LOADING... Click here to view page 2 of the Standard Normal Table. LOADING... Question content area bottom Part 1 (a) The minimum sample size required to construct a 90% confidence interval is enter your response here students. (Round up to the nearest whole number
An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within 1.4 years of the population mean. Assume the population of ages is normally distributed. (a) Determine the minimum sample size required to construct a 90% confidence interval for the population mean. Assume the population standard deviation is 1.6 years. (b) The sample mean is 20 years of age. Using the minimum sample size with a 90% level of confidence, does it seem likely that the population mean could be within 9% of the sample mean? within 10% of the sample mean? Explain. Click here to view page 1 of the Standard Normal Table. LOADING... Click here to view page 2 of the Standard Normal Table. LOADING... Question content area bottom Part 1 (a) The minimum sample size required to construct a 90% confidence interval is enter your response here students. (Round up to the nearest whole number
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
An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within
normally distributed.
1.4
years of the population mean. Assume the population of ages is (a) Determine the minimum sample size required to construct a
90%
confidence interval for the population mean. Assume the population standard deviation is
1.6
years.(b) The sample mean is
20
years of age. Using the minimum sample size with a
90%
level of confidence, does it seem likely that the population mean could be within
9%
of the sample mean? within
10%
of the sample mean? Explain.Click here to view page 1 of the Standard Normal Table.
Click here to view page 2 of the Standard Normal Table.
LOADING...
LOADING...
Question content area bottom
Part 1
(a) The minimum sample size required to construct a
90%
confidence interval is
enter your response here
students.(Round up to the nearest whole number.)
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