In: Statistics and Probability
The table below gives a breakdown of the root causes of a sample of 90 industrial accidents. Are there significant differences in the percentage of incidents in the four cause categories? Test using alpha =.05.
System Cause | Number of Incidents |
Design | 24 |
Procedures | 30 |
Management | 22 |
Training | 14 |
Total | 90 |
Give null, alternative, test statistic, decision, and conclusion.