Which probability distribution is used to develop a control chart for sample means?
A)Normal distribution
B)Chi-square distribution
C)Poisson distribution
D)Binomial distribution

Question

Quizplus · Accepted Answer

The control charts for sample means typically use the normal distribution as the probability distribution to plot the control limits. In this type of control chart, the data is collected in subgroups (typically 5 to 10 samples) and the mean of each subgroup is plotted on the control chart. The center line represents the mean of the process, and the upper and lower control limits are calculated based on the standard deviation of the subgroup means. Since the mean of a sample is a normally distributed variable, the normal distribution is used to calculate the control limits.

Which Probability Distribution Is Used to Develop a Control Chart