Management of Melodic Kortholt Company compared absenteeism rates in two plants on the third Monday in November. Of Plant A's 800 employees, 120 were absent. Of Plant B's 1200 employees, 144 were absent. MegaStat's results for a two-tailed test are shown below. $$\begin{array} { | r r l | }
\hline p 1 & p 2 & \
0.15 & 0.12 & \mathrm { p } \text { (as decimal) } \
120 / 800 & 144 / 1200 & \mathrm { p } \text { (as fraction) } \
120 . & 144 . & \mathrm { X } \
800 & 1200 & \mathrm { n } \
& & \
0.03 & \text { sample difference } & \
0.00 & \text { hypothesized difference } & \
0.01545 & \text { std. error } & \
\text { x.xx } & \text { z } & \
.0522 & \text { p-value (two-tailed) } & \
\hline
\end{array}$$ At ? = .05, the two-tailed test for a difference in proportions is:
A)just barely significant.
B)not quite significant.
C)not feasible due to nonnormality.

Question

Management of Melodic Kortholt Company compared absenteeism rates in two plants on the third Monday in November. Of Plant A's 800 employees, 120 were absent. Of Plant B's 1200 employees, 144 were absent. MegaStat's results for a two-tailed test are shown below. $$\begin{array} { | r r l | } 
\hline p 1 & p 2 & \
0.15 & 0.12 & \mathrm { p } \text { (as decimal) } \
120 / 800 & 144 / 1200 & \mathrm { p } \text { (as fraction) } \
120 . & 144 . & \mathrm { X } \
800 & 1200 & \mathrm { n } \
& & \
0.03 & \text { sample difference } & \
0.00 & \text { hypothesized difference } & \
0.01545 & \text { std. error } & \
\text { x.xx } & \text { z } & \
.0522 & \text { p-value (two-tailed) } & \
\hline
\end{array}$$ At ? = .05, the two-tailed test for a difference in proportions is:
A)just barely significant.
B)not quite significant.
C)not feasible due to nonnormality.

Quizplus · Accepted Answer

The p-value (0.0522) is greater than the significance level (0.05), so we fail to reject the null hypothesis. Therefore, we can conclude that there is not enough evidence to suggest a significant difference in absenteeism rates between the two plants.

Management of Melodic Kortholt Company Compared Absenteeism Rates in Two