Which violations of regression assumptions, if any, do you see in these residual diagnostics? Explain.
Answer to relevant QuestionsState your a priori hypotheses about the sign (1 or 2) of each predictor and your reasoning about cause and effect. Would the intercept have meaning in this problem? Explain. Based on the R2 and ANOVA table for your model, how would you describe the t? If you did not already do so, request a plot of residuals versus the fitted Y. Is heteroscedasticity a concern? Analysis of a Detroit Marathon (n = 1,015 men, n = 150 women) produced the regression results shown below, with dependent variable Time (the marathon time in minutes) and predictors Age (runner's age), Weight (runner's ...(a) Make a line chart for JetBlue's revenue. (b) Describe the trend (if any) and discuss possible causes. (c) Fit both a linear and an exponential trend to the data. (d) Which model is preferred? Why? (e) Make annual ...
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