Data Set 10-5: This experiment is modeled after part of the data needed to demonstrate the Hawthorne Effect. Four assembly-line workers, who normally had two coffee breaks and an hour for lunch, participated in a week-long experiment in which they gave up both coffee breaks and half their lunch hour. Productivity (units produced per hour) for these four was measured under both conditions and is shown below. $$\begin{array} { c c }
{ \text { Productivity/hour } } \
\text { Leisurely Schedule } & \text { Rushed Schedule } \
\hline 6 & 6 \
3 & 5 \
4 & 5 \
5 & 6
\end{array}$$
-The effect size index for Data Set 10-5 is
A) 1.23
B) 2.04
C) 2.45

Question

Data Set 10-5: This experiment is modeled after part of the data needed to demonstrate the Hawthorne Effect. Four assembly-line workers, who normally had two coffee breaks and an hour for lunch, participated in a week-long experiment in which they gave up both coffee breaks and half their lunch hour. Productivity (units produced per hour) for these four was measured under both conditions and is shown below. $$\begin{array} { c c } 
{ \text { Productivity/hour } } \
\text { Leisurely Schedule } & \text { Rushed Schedule } \
\hline 6 & 6 \
3 & 5 \
4 & 5 \
5 & 6
\end{array}$$
-The effect size index for Data Set 10-5 is
A) 1.23
B) 2.04
C) 2.45

Quizplus · Accepted Answer

The effect size index is calculated by comparing the mean productivity under both conditions. The mean productivity for the leisurely schedule is 4.5, and for the rushed schedule, it is 5.5. The effect size index is calculated as the difference in means divided by the standard deviation of the leisurely schedule, which results in approximately 1.23.

Data Set 10-5: This Experiment Is Modeled After Part of the Data