T-Test

If you compare two things alike Just like two mountains where you hike Don't go immediately to peer If bases are so far or near First try to see their heights and slopes The mound-shaped ones are all we hope Next find their curves — are they the same? The steeper ones aren't for the lame! If all of the above are good Then find the mean and not the mode Compute the distances between Two centers whilst their spreads ain't seen Divide this distance by the "pooled"-- But in reality we're fooled-- A standard dev Welch did revise With DF sum of both less twice