How Many Cycles Should Be Used in a Time Study

question 19

Multiple Choice

How many cycles should be used in a time study in order to be 95% confident that the time-study average job cycle time is within 5% of the true average job cycle time.Assume that the average job cycle time was 2.67 minutes and the standard deviation of the sample was 0.72 minutes.

• A)36 cycles
• B)72 cycles
• C)98 cycles
• D)112 cycles

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