The steps listed in the flowchart are as follows:
(1) Which parameter are we estimating?
If “Proportion, p,” forward to
and
and construct a confidence interval for p.
If “mean, μ,” forward to "Is n ≥ 30?"
(2) Is n ≥ 30?
If “Yes”, forward to "Compute t-interval"
If “No”, "Do the data come from a population that is approximately normal with no outliers?"
(3) Do the data come from a population that is approximately normal with no outliers?
If “Yes”, Compute t-interval
If “No”, Use nonparametric methods