February 11, 2008

February 11, 2008 - C. 68% of Y values fall within Y + S y|x

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February 11 Outline I. Continuation of regression problem II. Regression on SPSS III. Omit prediction of X from Y (pp. 143- 146) IV. Errors in prediction A. Assumption of homoscedasticity B. Standard error of estimate ( 29 ( 29 [ ] 2 / 2 | - - - = N SS N Y X XY SS s X Y X Y V. Interpretation A. Reminder about normal curve B. Assumption of normality of Y values
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Unformatted text preview: C. 68% of Y values fall within Y + S y|x Homoscedasticity: the assumption that the variability of Y remains constant for all values of X Standard error of estimate: the average deviation of the Y values from the regression line (Y values)...
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February 11, 2008 - C. 68% of Y values fall within Y + S y|x

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