Construct a 95% confidence interval for the average number of machine breakdowns
Two hundred simulation runs were completed using the probability of a machine breakdown from the table below. The average number of breakdowns from the simulation trials was 1.93 with a standard deviation of 0.20.
No. of breakdowns per week Probability Cumulative probability
0 .10 .10
1 .25 .35
2 .36 .71
3 .22 .93
4 .07 1.00
A) 1.896 to 1.938
B) 1.902 to 1.958
C) .1.877 to 1.943
D) 1.907 to 1.953
Answer: B
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