4. Use Scenario 3-8. Which of the following is the plot of residuals versus fish

Question

4. Use Scenario 3-8. Which of the following is the plot of residuals versus fish lengths? Residuals versus fish length Residuals versus fish length 15 10 15 D. A. 42 44 46 48 50 5.2 Fish length 42 44 46 48 50 52 Fish length Residuals versus fish length Residuals versus fish length 50 E. B. 2.5 42 44 46 48 50 52 Fish length 4.2 44 4.6 4 50 52 Fish lengtl Residuals versus fish length 15 C. 4.2 44 46 48 S0 5.2 Fish length 5. A study of the effects of television on child development measured how many hours of television each of 125 grade school children watched per week during a school year and each child's reading score. Which variable would you put on the horizontal axis of a scatterplot of the data? A. Reading score, because it is the response variable. B. Reading score, because it is the explanatory variable. C. Hours of television, because it is the response variable. D. Hours of television, because it is the explanatory variable. It makes no difference, because there is no explanatory-response distinction in this study. E.

Explanation / Answer

The study consists of finding an association between the number of hours of television watched per week and the reading score.

The reading score is assumed to be a measure of the child's development.

The study wants to establish if there is a role of the number of hours of television watched on the child's development.

The number of hours of television watched would explain the changes in the child's reading score.

Hence it is an explanatory variable and will be put on the horizontal axis of the scatter plot.

Option (d) is the correct answer

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