Appendix B: Reference Information 632
2-SampFTest
2-SampFTest2-SampFTest
2-SampFTest
Below is the definition for the 2-SampÜTest.
2-SampÜTest for the alternative hypothesis .
2-SampÜTest for the alternative hypothesis .
Sx1, Sx2=Sample standard deviations having
and degrees of freedom df,
respectively.
Ü=Û-statistic =
df(x, , )=Ûpdf( ) with degrees of freedom df, ,
and
p= reported p value
n11–
n21–
Sx1
Sx2
---------
⎝⎠
⎛⎞
2
n11– n21– n11–
n21–
σ1σ2
>
pf
F
α
∫xn
11n21–,–,()dx=
σ1σ2
<
pf
0
F
∫xn
11n21–,–,()dx=