Contrasts
we conduct
hypothesis tests ,
to see if Ho :L, =
dz = . ..
=
✗a = 0 (treatment effects = 0 )
we
perform further
analysis using contrasts .
Compare treatment
>
means
>
test for size of differences between treatments
>
see if interactions
any treatment
effects
treatment
means
f
^
Definition : A linear combo of parameters ( ✗i or Mi )
h =
Ihi .
Chi or
Mi ) such that Shi = 0
L v
coefficients coefficients sum to aero
of parameter
terms ie
) µ A Ups -
= 0
Shi = (1) + C- 1)
=
0 ✓✓
we conduct
hypothesis tests ,
to see if Ho :L, =
dz = . ..
=
✗a = 0 (treatment effects = 0 )
we
perform further
analysis using contrasts .
Compare treatment
>
means
>
test for size of differences between treatments
>
see if interactions
any treatment
effects
treatment
means
f
^
Definition : A linear combo of parameters ( ✗i or Mi )
h =
Ihi .
Chi or
Mi ) such that Shi = 0
L v
coefficients coefficients sum to aero
of parameter
terms ie
) µ A Ups -
= 0
Shi = (1) + C- 1)
=
0 ✓✓
