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When calculating a correlation coefficient, why is it important to divide the sum of cross-products of Z scores by the number of people in the study?

When calculating a correlation coefficient, why is it important to divide the sum of cross-products of Z scores by the number of people in the study?

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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When calculating a correlation coefficient. why is it important to divide the sum of cross-products of Z scores by the number of people in the study? O The less people in a study the larger the sum of the cross-products will be, even if the strength of the correlation is the same. By dividing by the number of people, you are able to correct for this. The less people in a study, the larger the sum of the cross-products will be, even if the strength of the correlation is the same. By dividing by the number of people minus one, you are able to correct for this. The more people in a study, the larger the sum of the cross-products will be, even if the strength of the correlation is the same. By dividing by the number of people, you are able to correct for this. None of the above
Transcribed Image Text:When calculating a correlation coefficient. why is it important to divide the sum of cross-products of Z scores by the number of people in the study? O The less people in a study the larger the sum of the cross-products will be, even if the strength of the correlation is the same. By dividing by the number of people, you are able to correct for this. The less people in a study, the larger the sum of the cross-products will be, even if the strength of the correlation is the same. By dividing by the number of people minus one, you are able to correct for this. The more people in a study, the larger the sum of the cross-products will be, even if the strength of the correlation is the same. By dividing by the number of people, you are able to correct for this. None of the above
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