10-24-08

# 10-24-08 - Psychology 206 Class Notes 10/24/08 EXAM #2...

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Psychology 206 – Class Notes – 10/24/08 EXAM #2 covers chapters 7, 8, 9, 10, 11: Wednesday November 5 th There are as many cross products as there are pairs of Zx and Zy r = Sum(Zx*Zy)/N VERY, VERY IMPORTANT CONCEPT – EXAM QUESTION (know the following): Cross products Sum of cross products Average cross products Which variable goes on the X or Y axis? Does not matter, unless you have a two level nominal variable. In that case, place the nominal variable is on the X-axis Use 0 and 1 to code your dichotomous, nominal variables in order to use the pearson correlation coefficient for your point-biserial equation. o IT IS STILL POINT-BISERIAL, but you could use pearson to calculate the correlation coefficient You must determine what scale of measurement is used for each variable CHAPTER #11 – REGRESSION Major statistical technique Many fields Many applications Multiple regression - Line of best fit o What is its intercept? o

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## This note was uploaded on 06/03/2009 for the course PSYCH 206 taught by Professor Kenney-benson during the Fall '07 term at Allegheny.

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10-24-08 - Psychology 206 Class Notes 10/24/08 EXAM #2...

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