I feel like this is a basic question and/or I'm missing/have forgotten something obvious.
Is there an equivalent of "confidence intervals" which one uses for the mean, but for the whole population?
E.g. given a sample distribution (which may or may not be normal), is there some way I can specify limits and say, "with y% confidence, we can say that any given x from the population will fall within these two limits)?
I suppose if the data is normally distributed, I could look at the Z-scores?
Should point out that some of the samples of interest are NOT normally distributed, although some are.