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What will likely happen if no correlation exists between two variables?

What will likely happen if no correlation exists between two variables?

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A. As one variable changes, one cannot predict a value for the other variable
B. As one variable increases, the other variable decreases
C. As one variable decreases, the other variable decreases
D. As one variable decreases, the other variable increases

This question is part of Six Sigma Green Belt Exam
Asked by PracticeExcellence, Last updated: Jan 09, 2018

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2 Answers

l.Steven

L.Steven

Answered on Jan 07, 2018

When no correlation is there between two variables, then as one variable changes, one cannot predict a value for the other variable. Correlation and dependence is a topic of statistics in which it is investigated whether two variables carry any sort of statistical relationship or not.

In common usage, correlation can be defined as the extent to which two variables are likely to have a linear relationship among each other. Correlations can be used to predict behavior of variables such as the weather and the electricity demand. However in general, the presence of a correlation does not indicate that there will definitely be a causation.

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John Smith

John Smith

Answered on Jan 25, 2017

As one variable changes, one cannot predict a value for the other variable
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