An experiment was conducted to compare the effect of three types of daily schedules on the employees' work performance. The schedules all contained the same amount of tasks, but the tasks were listed in different orders in each schedule. The day of the week was used as the blocking variable. The mean scores on the dependent variable, the percentage of tasks completed, are listed here for each cell.

$\begin{array}{c}
\text { Weekday }\
\hline\begin{array}{cccccc}
\text { Type of }\
\text { schedule } & \text { Monday } & \text { Tuesday } & \text { Wednesday } & \text { Thursday } & \text { Friday } \
\hline 1 & 70 & 89 & 74 & 85 & 75 \
2 & 74 & 94 & 81 & 90 & 80 \
3 & 80 & 98 & 85 & 96 & 84
\end{array}\end{array}$
Use these cell means to graph the interaction between type of schedule and the day of the week.
a. Is there an interaction between type of schedule and the day of the week?
b. What kind of recommendation would you make to the manager?

Question

An experiment was conducted to compare the effect of three types of daily schedules on the employees' work performance. The schedules all contained the same amount of tasks, but the tasks were listed in different orders in each schedule. The day of the week was used as the blocking variable. The mean scores on the dependent variable, the percentage of tasks completed, are listed here for each cell.

$\begin{array}{c}
\text { Weekday }\
\hline\begin{array}{cccccc}
\text { Type of }\
\text { schedule } & \text { Monday } & \text { Tuesday } & \text { Wednesday } & \text { Thursday } & \text { Friday } \
\hline 1 & 70 & 89 & 74 & 85 & 75 \
2 & 74 & 94 & 81 & 90 & 80 \
3 & 80 & 98 & 85 & 96 & 84
\end{array}\end{array}$ 
Use these cell means to graph the interaction between type of schedule and the day of the week. 
a. Is there an interaction between type of schedule and the day of the week?
b. What kind of recommendation would you make to the manager?

Quizplus · Accepted Answer

The Answer is The profile plot of cell means is shown as follows.

a. No, there does not appear to be an interaction between type of schedule and the day of the week. The three lines (representing three types of schedules) in the plot are almost parallel, indicating that the effects of type of schedule are similar for each weekday.

b. Results suggest that the effects of type of schedule are generalizable across all weekdays. Therefore, the manager should implement schedule type 3, which consistently yields the best work performance throughout the week.

An Experiment Was Conducted to Compare the Effect of Three