Using an alpha level of 0.05, are domestic calls more dangerous for officers than other types of calls? Compute Cramer’s V and identify if it is a small, medium, or large effect.
. A professor at the University of Iowa was interested in evaluating whether domestic dispute calls were more dangerous to officers than other types of calls. Collecting information on call for service and whether the call resulted in officer injury. The data is displayed in the contingency table below.
|
|
|
Type of Call |
|
|
|
|
Domestic Dispute |
Not a Domestic Dispute |
|
Officer Injury |
No |
128 |
675 |
|
|
Yes |
245 |
786 |
Using the information to complete Table 1 and answer the questions below.
Table 1. Chi-square
|
Category |
Observed |
Expected |
O – E |
(O – E)2 |
(O – E)2/E |
|
No, Domestic |
128 |
163.31 |
-35.31 |
1246..796 |
7.64 |
|
No, Not Domestic |
675 |
639.69 |
35.31 |
1246.796 |
1.95 |
|
Yes, Domestic |
245 |
209.69 |
35.31 |
11506.85 |
5.951.52 |
|
Yes, Not Domestic |
786 |
821.31 |
-35.31 |
1246.796 |
|
|
Using an alpha level of 0.05, are domestic calls more dangerous for officers than other types of calls? |
|
Compute Cramer’s V and identify if it is a small, medium, or large effect. |
Step by step
Solved in 2 steps with 2 images
