There Are Many Programs That Seek to Change Behavior Data Set B

There are many programs that seek to change behavior. One way to assess the effect of a program is to give a pretest, administer the program, and give a posttest. To really prove the lasting value of the program, however, a researcher must gather follow-up data some months later to see if the improvement seen at posttest has continued. In the scores below, larger numbers represent improved performance. Analyze the data, compile it into a summary table, and make three HSD comparisons. Write an interpretation that describes the effect of the program.Three data sets (labeled A, B, and C) are provided for problem 5. Data Set A
$\begin{array}{lccc} & \text { Pretest } & \text { Posttest } & \text { One-year follow-up } \\\text { Subject1 } & 10 & 28 & 21 \\\text { Subject 2 } & 13 & 27 & 24 \\\text { Subject 3 } & 17 & 36 & 26 \\\text { Subject 4 } & 18 & 31 & 20\end{array}$

Data Set B
$\begin{array}{lrcc} & \text { Pretest } & \text { Posttest } & \text { One-year follow-up } \\\text { Subject 1 } & 9 & 23 & 18 \\\text { Subject 2 } & 13 & 27 & 24 \\\text { Subject 3 } & 17 & 36 & 26 \\\text { Subject 4 } & 18 & 31 & 20\end{array}$

Data Set C
$\begin{array}{lccc} & \text { Pretest } & \text { Posttest } & \text { One-year follow-up } \\ \text { Subject } 1 & 10 & 28 & 21 \\\text { Subject 2 } & 13 & 27 & 24 \\\text { Subject 3 } & 17 & 36 & 26\end{array}$