7.independent t-test Flashcards
t test independent assumption
between assumptions
para assumptions
t test indepndent
less susceptibility of boredom
t test between
DV- interval or ratio
IV- two group compare variables
para assumptions
DV INTERVAL OR RATIO
normal dis
homogeneity of varience
no outliers.
t tests explains normailty
normaility is p bigger 0.05
assess skew and kurtosis
as between DV are distributed each level of IV
(WITHIN HAS DIFFERENT IV)
whats varience
similar scores little varience
large spread data large varience
what’s homogeneity of variance
variaility of score around mean ( varience) each group is similar (homogenous)
- don’t need within subject design
whats levenes test
check homogeneity of variance
- automatic when run t test ( independent)
When look at Levenes test
if p bigger 0.05 shows normaility and groups dont differ
- NOT VIOLATED ASSUMPTIONS
(read violated or not violated assumptions depending)
t tests run null hypotheisis ( mean)
that tests between two mean is 0
what t test takes into account
sample size.
difference between 2 means.= indicate sig( less likley due to chance
SD
less varience with 2 samples is best
why less varient important in group
data lights clustered
what does low varience mean
HOMOGENITY
what is alternative hypothesis
large mean
low var=( always want low var)
