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t-tests & confidence limits

> # Uneq var t-test of diff between means > p*2 # 2-tailed P-value (method 1) [1] 0.07533183 > t # observed t-value [1] 2.306873 > # corrected critical value (method 2) > (qt(0.975,n1-1)*v1/n1+qt(0.975,n2-1)*v2/n2)/(v1/n1+v2/n2) [1] 2.746209 > > d # observed difference between means [1] 35.27273 > d+qt(0.05/2,df)*se # lower 95% limit [1] -5.462216 > d-qt(0.05/2,df)*se # upper 95% limit [1] 76.00767