What?
The 1-sample t-Test is a tool for testing hypothesis about the location of the sample mean and a target mean being equal.
It is used with continuous data.
Why?
1. The 1-sample t-test is useful in identifying a significant difference between a sample mean and a specified value when the difference is not readily apparent from graphical tools.
2. Wile comparing data gathered before and after process improvements, the 1-sample t-test helps to prove that the mean has shifted.
When?
1. When comparing sample mean to a specified value
2. When making judgements about a process based on a sample output from that process.
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