January 17, 2006
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. . .statistics. . .
in stats, we learned that if the calculator tells us r^2 = .98, we're supposed to write "98 percent of the variation in y is explained by x." that was a semester ago, and i still haven't half a blue idea in a rainbow stats class what it's supposed to mean. 98 percent of the variation in y is explained by x???
if anyone knows, i'd really appreciate an explanation!
Comments (2)
r is the correlation, while r^2 is called the coefficient of determination. It represents the percentage of y variations that can be explained by x variations. For example, in your case it would mean 98 percent of the variations in y values are totally reasonable because they can be explained by the corresponding x values' variation. magnitude of r is often an indicator of the strength of the relationship between the two variables.
but why do u need to worry about this anyway?!
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