Share
Explore BrainMass

Paired t test for injury data

A company implemented a safety program designed to reduce the number of work related injuries. Human Resources department collected the following data to verify the effectiveness of the program:

Number of injuries per week
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8

Before
4
5
2
2
3
3
6
3

After
3
1
0
0
1
2
2
4

Has there been a statistically significant decrease in the number of injuries since the implementation of the program? Use the .05 significance level.

Solution Summary

Paired t test for safety program designed to reduce the number of work related injuries. Null Hypothesis, Alternative Hypothesis, Significance Level, Critical Value, P value are given in the solution.

$2.19