Z-scores X (test scores) = 3, 5, 8, 8, 9, 4, 7, 8, 6, 7, 10 %3D •Calculate the mean of x •Calculate the variance of x •Calculate the standard deviation of x •Calculate the z-score for the first and last person •Are they statistically significantly different from the mean? Σ 1-1 X%3D E(x-x)² X; X- S = = Z n-1

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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PLEASE HELP ME FIND THE POPULATION MEAN, I AM SO STUCK 

Z-scores
X (test scores) = 3, 5, 8, 8, 9, 4, 7, 8, 6, 7, 10
%3D
•Calculate the mean of X
Σ
•Calculate the variance of x
•Calculate the standard deviation of x
•Calculate the z-score for the first and last person
•Are they statistically significantly different from
the mean?
E(x-x)²
2
X, -x
z =
S =
n-1
Transcribed Image Text:Z-scores X (test scores) = 3, 5, 8, 8, 9, 4, 7, 8, 6, 7, 10 %3D •Calculate the mean of X Σ •Calculate the variance of x •Calculate the standard deviation of x •Calculate the z-score for the first and last person •Are they statistically significantly different from the mean? E(x-x)² 2 X, -x z = S = n-1
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