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The scores on a placement test given to college freshmen for the past five years are approximately normally distributed with a mean μ = 74 and c variance o² = 8. Would you still consider o2 = 8 to be a valid value of the variance if a random sample of 20 students who take the placement test this year obtain a value of s² = 20?

The scores on a placement test given to college freshmen for the past five years are approximately normally distributed with a mean μ = 74 and c variance o² = 8. Would you still consider o2 = 8 to be a valid value of the variance if a random sample of 20 students who take the placement test this year obtain a value of s² = 20?

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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The scores on a placement test given to college freshmen for the past five years are approximately normally distributed with a mean μ = 74 and a variance o² = 8. Would you still consider o2 = 8 to be a valid value of the variance if a random sample of 20 students who take the placement test this year obtain a value of s² = 20?
Transcribed Image Text:The scores on a placement test given to college freshmen for the past five years are approximately normally distributed with a mean μ = 74 and a variance o² = 8. Would you still consider o2 = 8 to be a valid value of the variance if a random sample of 20 students who take the placement test this year obtain a value of s² = 20?
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