Question

Decide (with short explanations) whether the following statements are true or false.

e) In a simple linear regression model with explanatory variable x and outcome variable y, we have these summary statisties z-10, s/-3 sy-5 and у-20. For a new data point with x = 13, it is possible that the predicted value is y = 26. f A standard multiple regression model with continuous predictors and r2, a categorical predictor T with four values, an interaction between a and Τ, and an intercept has for its model coefficients an 11 x 1 vector B. g) In a standard multiple regression model, if a plot of residuals versus fitted values shows a fan-shaped pattern with residuals becoming more spread out as fitted values increase, a log transformation of the response variable may result in data more consistent with model assumptions h) If the outcome variable is continuous and all explanatory variables take values 0 or 1, a logistic regression model is most appropriate.

Answer 1

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