A Manager of the Restaurant Chain Examines How Waiters' Hourly

question 43

Multiple Choice

A manager of the restaurant chain examines how waiters' hourly wages affect the average service rating from visitors. A scatterplot of the data, a residual plot, and a histogram of standardized residuals are shown below. Are the assumptions of the simple linear regression model reasonable? ​ ​

• A) No, because the histogram of standardized residuals is skewed.
• B) No, because the residual plot shows a curved pattern.
• C) No, because the spread around the line on the residual plot does not appear to be constant.
• D) No, because the residual plot indicates a large residual.
• E) Yes, all the conditions for a linear regression are met.

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