Flashcards in t-tests Deck (5)
Is it possible to totally avoid making a Type I error?
Only if you test the entire population!
There is always a chance of a Type I error when inferring a
significant effect from sample to population
What does a positive skew show?
Low scores over represented
‘Tail’ in the +ive direction
What does a negative skew show?
-High scores over represented
‘Tail’ in the –ive direction
Homogeneity of variance?
Want variance to be the same (or similar) in all groups
-Homogeneity = same
-Heterogeneity = different