STATISTICAL TECHNIQUES AND TOOLS
CORRELATION COEFFICIENT COEFFICIENT OF DETERMINATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the value of one variable tends to increase as the other variable increases.
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the value of one variable tends to increase as the other variable decreases.
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the value of one variable tends to increase regardless how the other variable change.
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the values of both variables are always positive.
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Detailed explanation-1: -A positive correlation is a relationship between two variables that tend to move in the same direction. A positive correlation exists when one variable tends to decrease as the other variable decreases, or one variable tends to increase when the other increases.
Detailed explanation-2: -A negative correlation is a relationship between two variables such that as the value of one variable increases, the other decreases. Correlation is expressed on a range from +1 to-1, known as the correlation coefficent. Values below zero express negative correlation.
Detailed explanation-3: -In statistics, a positive correlation shows that changes in one variable will relate to the same type of changes in a second variable. The data is usually displayed in a scatterplot, which shows the linear relationship between variables in a positive correlation graph.