STATISTICAL TECHNIQUES AND TOOLS
REGRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Positive correlation
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Negative correlation
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No correlation
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None of the above
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Detailed explanation-1: -Negative Correlation Scatterplot A scatterplot with a negative correlation is a graph that shows that all of the data points are in a pattern trending down from left to right. The scatterplot shows that, in general, as x increases, y decreases which means the data points have a negative association or relationship.
Detailed explanation-2: -Positive correlation means that as the first variable increases, the second variable increases as well. This corresponds to points (and a line of best fit) that move up as you go from left to right. Negative correlation would mean that as one variable increases, the second variable decreases.
Detailed explanation-3: -A scatterplot displays the strength, direction, and form of the relationship between two quantitative variables. A correlation coefficient measures the strength of that relationship. Calculating a Pearson correlation coefficient requires the assumption that the relationship between the two variables is linear.