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What is 1 + 3?
-how strong the relationship is. more slope is better
-how close/far the dots are fome the line. closer is better
-how reliable? if you were to take a survey of people, what chance will it be the same?
-substative significance for nominal and ordinal data
-independent variable in the the column
-eyeball data-compare column %
original err rate - new err rate / original err rate
-how accurate you will predict the vaiable by only knowing one variable
1=perfect correlation, 0= no correlation
-bigger is better