Estimate Difference of Means

 

If you need an estimate of a mean, choose Estimate Parameters from the Analyze menu, then choose Difference of Means from the popup.

Enter the relevant statistics or drop attributes into the upper pane.

As shown at right (in "non-verbose" mode), Fathom computes an estimate at a given confidence level which you can change.

You can also decide whether Fathom uses pooled or unpooled variances, the latter using weaker assumptions and producing somewhat larger intervals.