Card Set Information
are "measures of association"
a measurement of linear (straight line) relationship
measure of association
a number that measures how related two variables are
when two variables are related, this means that when one changes, the other changes
Pearson's product moment correlation
the most common correlation
referred to as "the correlation"
it is used with quantitative (numerical) variables
the symbol is r
correlation lies between -1 and 1
the measure of how close the points in the scatterplot are to the best fitting straight line
it's negative when the line goes down, positive when the line goes up, and 0 when the line is flat
the best fitting straight line
square of correlation
sometimes called "variance accounted for" or "shared variance"
it is interpreted as the amount of variance in the y variable accounted for by the x variable
error in the prediction
regression and correlation
yeild three important numbers:
slope of best fitting line
intercept of best fitting line