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ISYE 6414 Midterm Prep 2025 Questions and Answers We can assess the constant variance assumption in linear regression by plotting the residuals vs. fitted values. - --CORRECT ANSWER--True If one confidence interval in the pairwise comparison in ANOVA includes zero, we conclude that the two corresponding means are plausibly equal. - --CORRECT ANSWER--True The assumption of normality is not required in linear regression to make inference on the regression coefficients. - --CORRECT ANSWER--False (Explanation: is required) We cannot estimate a multiple linear regression model if the predicting variables are linearly independent. - --CORRECT ANSWER--False (Explanation: linearly dependent) If a predicting variable is a categorical variable with 5 categories in a linear regression model without intercept, we will include 5 dummy variables. - -CORRECT ANSWER--True ....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1