Paired t test for injury data
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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.
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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.
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