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How Many Cycles Should Be Used in a Time Study

Question 15

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How many cycles should be used in a time study in order to be 98% confident that the time-study average job cycle time is within 4% of the true average job cycle time.Assume that the average job cycle time was 4.25 minutes and the standard deviation of the sample was 0.65 minutes.


A) 55 cycles
B) 70 cycles
C) 80 cycles
D) 95 cycles

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