Answer:
False
Step-by-step explanation:
The answer is false because that's not what and X-bar chart is used for. An X-bar chart is used in monitoring the mean and the variation of a process. This monitoring is based on samples are taken from the process at a particular time. It could be between hours, or days. It could be between weeks, or shifts. It could be months, or years, whichever it is.
The measurements of the samples at that particular time makes up what we call a subgroup. And usually, the subgroups or a series of them, are used in the estimation of the mean and even the standard deviation of any process.