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Unformatted text preview: 109) Since circulation has pvalue less than .05, I would keep it in the model. Percentage of males, however, should first be taken out since it is the most insignificant variable due to its highest pvalue of .815. If necessary, I would remove median income as well. d)scatterplot of residuals versus predicted values there is a certain pattern present in the residual plot, hence the linearity assumption is not satisfied. Perhaps the relationship is not linear. Heteroscedasticity does not seem as evident here. A transformation applied to the variables may fix these problems. For example, I would probably try to transform the page cost and or circulation variables by taking the natural log. e)...
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 Spring '07
 Lv
 Business, Statistics, Normal Distribution, Regression Analysis, Heteroscedasticity

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