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A statistics professor wants to estimate the mean score on a finalexam given to several classes. Prior knaaladye indiutes that the standand deviatiom is o= l1,5. How large should her sample be if she wants to be 90% Confidant that the Sauple mean is withn 2 pemts of the popu latrem mean?

A statistics professor wants to estimate the mean score on a finalexam given to several classes. Prior knaaladye indiutes that the standand deviatiom is o= l1,5. How large should her sample be if she wants to be 90% Confidant that the Sauple mean is withn 2 pemts of the popu latrem mean?

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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Please help me with this this two answers, I need them with explanation and formulas please
3 A statistics professor wants to estimate the Mlan score on a final. exam.given to several classes, Prior knoaledye indicates that the standand dreviatiom is o = ll.s. How large should her sample be if she wants to be 90% Confidant that the Sample n mean is withen 2 ponts of the popu lation mean? A stady of 390 Stadents show ed that the probablity of Find a Changing majors in. the frst twe years is e63 , 99% Con ficdence nterval to estimate the probubility that a Stadent will change their major ion the frst tue years.
Transcribed Image Text:3 A statistics professor wants to estimate the Mlan score on a final. exam.given to several classes, Prior knoaledye indicates that the standand dreviatiom is o = ll.s. How large should her sample be if she wants to be 90% Confidant that the Sample n mean is withen 2 ponts of the popu lation mean? A stady of 390 Stadents show ed that the probablity of Find a Changing majors in. the frst twe years is e63 , 99% Con ficdence nterval to estimate the probubility that a Stadent will change their major ion the frst tue years.
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