Chapter 12, Problem AP4.39CPT

To determine

To find out what does the model predict about their later fear ratings.

Answer to Problem AP4.39CPT

Option (d) is the correct option.

Explanation of Solution

In the question, the researchers wants to find out do the children’s fear levels change over time and in what ways. The scatterplot are given in the question. Thus, it is given that slope of linregis $0.397911$ . The slope of linreg multiplied by difference in initial rating as:

  $\begin{array}{l}0.2\times 0.397911\\ =0.0796\\ \approx 0.08\end{array}$

Thus, option (d) is the correct option.