Answer:
Pooled variance =6
Step-by-step explanation:
Cohen's d is usually used in metal analysis. The formular for Cohen's d is given by:
Cohen's d= mean difference/ pooled variance.
Mathematically, it is written as:
Cohen's d =( M1 - M2) / S^2p
Where M1= mean for group 1
M2= mean for group 2
S^2p = pooled variance
Given:
M1= 20 , M2 = 17 and Cohen's d = 0.50
Pooled variance = ( M1 - M2)/ Cohen's d
Pooled variance = (20 - 17 ) / 0.5 = 3/0.5
Pooled variance = 6
