In statistics we say that there is an ___________________ between two variables if the two variables are statistically related to each other; if the value of one of the variables can be used to estimate the value of the other.
Association
The ___________________ is a number between -1 and 1 that describes the strength and direction of a linear association between two numerical variables.
Correlation coefficient
The ___________________ travels through the middle of the points the closest.
Line of best fit
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