Page 235 - Quantitative Data Analysis

Quantitative Data Analysis
Simply Explained Using SPSS

13.
̅ − ̅

√

where ̅ mean of group

varianceof group

sample size of group
Note:

̅
14.
( ⁄ )
√
where ̅ is the mean of the difference scores (groupe 1 –
groupe 2 )
is the standard deviation of the difference scores
is the sample size
Note:

∑ − ̅ − ̅
15. −
16.

∑ − ̅ − ̅
17.
−
ˆ
18. Regression EquationY  bX  a

 S 
19. Slop:  rb  Y 


 S X 
20. Intercept: a  Y  b X

The Theory and Applications of Statistical Inferences 219