Texas Instruments TI-84 - Manual (Page 635)

Appendix B: Reference Information 632
2-SampFTest 2-SampFTest 2-SampFTest 2-SampFTest
Below is the definition for the 2 - Samp
Ü
Test .
2 - Samp
Ü
Test for the alternative hypothesis .
2 - Samp
Ü
Test for the alternative hypothesis .
Sx 1, Sx 2 = Sample standard deviations having
and degrees of freedom df ,
respectively.
Ь
= Ы-statistic =
df ( x, , )
= Û
pdf ( ) with degrees of freedom df , ,
and
p = reported p value
n
1
1 –
n
2
1 –
Sx1
Sx2
---------
⎝ ⎠
⎛ ⎞ 2
n
1
1 – n
2
1 – n
1
1 –
n
2
1 –
σ
1
σ
2
>
p f
F
α
∫
x n
1
1 n
2
1 – , – ,
( )dx
=
σ
1
σ
2
<
p f
0
F
∫
x n
1
1 n
2
1 – , – ,
( )dx
=