The table below shows the time in months between occurrences of safety violations for three operators, "A," "B," and "C," working in a toll manufacturing facility.
|
A
|
1.31
|
0.15
|
3.02
|
3.17
|
4.84
|
0.71
|
0.70
|
1.41
|
2.68
|
0.68
|
|
B
|
1.94
|
3.21
|
2.91
|
1.66
|
1.51
|
0.30
|
0.05
|
1.62
|
6.75
|
1.29
|
|
C
|
0.79
|
1.22
|
0.65
|
3.90
|
0.18
|
0.57
|
7.26
|
0.43
|
0.96
|
3.76
|
Postulate an appropriate probability model for the phenomenon in question, treat the data set as three random samples of size n = 10 each, from the three di?erent populations represented by each operator. Obtain precise 95% con?dence interval estimates of the unknown population parameters. Interpret your results in terms of any di?erences that might exist between the safety performances of the three operators.