T Values Students Test Pops Sd^2 H0 Diff

 data must be normally distributed with enough data for reliable mean

- t is mean of pop1 - mean of pop2 (ignore - sign in answer) over the root of SD^2 of 1 over no of values of 1 + SD^2 of 2 over no of values of 2

- state H0 (no sig diff between pops) so observed diff due to chance variation

- calc df which is (n1+n2)-2, look at table of values of t and see where t value lies at the dpecific df, if >0.05, accept H01+n2)-2, look at table of values of t and see where t value lies at the dpecific df, if >0.05, accept H0 and if <0.05 reject H0, then conclude with context