If the upper and lower control limits are set at ±3 standard deviations from the mean,we would expect that ________.
A)99.7% of the sample means are within the control limits
B)95% of the sample means are within the control limits
C)about 68% of the sample means are within the control limits
D)about 5% of the sample means are outside the control limits

Question

Quizplus · Accepted Answer

Setting the control limits at ±3 standard deviations from the mean corresponds to the empirical rule, which states that approximately 99.7% of the data falls within these limits for a normal distribution.

If the Upper and Lower Control Limits Are Set at ±3