Quiz 4 Review Answers.pdf - Quiz 4 Review Answers Chapter 19 Linear Patterns 1 A regression model that involves a single independent variable is called

Quiz 4 Review Answers.pdf - Quiz 4 Review Answers Chapter...

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Quiz 4 Review Answers Chapter 19: Linear Patterns 1. A regression model that involves a single independent variable is called ________. A) single regression B) unit regression C) simple regression D) individual regression E) multiple regression 2. In regression the variable that we are trying to predict is called the _response_ variable (usually on the y-axis of a scatter plot). The associated variable goes on the x-axis and this predictor variable is called the _explanatory variable_. 3. We can have more than one explanatory variable that predicts our response variable. 4. The vertical deviations of a point from the fitted line or the least squares regression line is called the __Residual__. 5. The least squares regression analysis picks a line that minimizes the overall sum of the residuals. 6. The following is the least-squares regression line that captures the relationship between smoking (number of packs a day) and number of days missed from work annually for factory workers: = 6 + 1.5 And the P-value is p < 0.001. For every one cigarette pack a person smokes a day, the model predicts that, on average, a factory worker will miss an additional ___ day(s) from work. x