If you increase the size of the samples taken when using an $\overline { X ^ { * } }$ chart, it is necessary to recalculate your control limits because the limits will be narrower.

Question

Quizplus · Accepted Answer

When the sample size is increased, the standard deviation of the sample mean reduces, leading to narrower control limits. Therefore, it is necessary to recalculate the control limits to reflect the new sample size.

If You Increase the Size of the Samples Taken When X∗‾\overline { X ^ { * } }X∗

If You Increase the Size of the Samples Taken When $\overline { X ^ { * } }$