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 is 4.25 minutes and the standard deviation of the sample is 0.65 minutes.
A)55 cycles
B)70 cycles
C)80 cycles
D)95 cycles

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The Answer of 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 is 4.25 minutes and the standard deviation of the sample is 0.65 minutes.
A)55 cycles
B)70 cycles
C)80 cycles
D)95 cycles

How Many Cycles Should Be Used in a Time Study