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Unformatted text preview: Marginal is a row (or column total) / overall total Joint: happy and in class is 2/ 100 Marginal: happy is 42/ 100 At home is 50/100 Conditional: happy given in class is 2/50 Not happy given at home is 10/50 Key words: and implies joint, given implies conditional, lack of the first two pretty much implies marginal R from cov, stdev x, stdev y Cov from r, stdev x, stdev y R from r2 Var/ stdev Mean R from a scatterplot Note: Excels covar uses n, not n-1. This is the problem....
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