3 Flashcards
give the F statistic formula
F between/Fwithin
In ANOVA the variability between groups is due to
the grouping factor
ANOVA variability within groups is due to
chance
when computing df in ANOVA how is the within group estimate calculated?
N-k
when interpreting F(2,27)=8.80<.05, how many groups do we have?
3
using ANOVA a Null hypothesis looks like
u1=u2=u3
what statistical technique is used to make predictions of future outcomes based on present data
linear regression
what can be used at the basis for prediction?
correlation
what is used to predict the best guess as to the predicted Y variable score based on X
linear regression
if the absolute value of your correlation is 1, your error in prediction will be
0
to predict one variable from another you must first
compute the correlation
using the regression formula with a slope =.704 and intercept of .719 what would be your predicted GPA?
2.97
if you are trying to predict Y scores from X scores X is referred to as
independent variable
formula for one sample chi square
x2=sum(E-O)2/E
One sample chi square is known as
goodness of fit test
