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A __________ exists between two variables when the values of one variable are somehow associated with the values of the other variable.
A correlation: exists between two variables when the values of one variable are somehow associated with the values of the other variable.
When determining whether there is a correlation between two variables, one should use a ____________ to explore the data visually.
__ Scatterplot.
Which of the following statements about correlation is true?
c:- We say that there is a positive correlation between x and y if the x-values increase as the corresponding y-values increase.
The ______________ measures the strength of the linear correlation between the paired quantitative x- and y-values in a sample.
: linear correlation coefficient r