Dear All
I have two continuous variables and each has two categories as follows:
X = a and b
Y= c and d
I have calculated the standardised mean difference (SMD) for *X* and *Y
using meta-analysis.*
I want to calculate *X* differences associated with *Y*.
Would you please advise me how I can do it. Here is a sample of data. Thank
you, Julie
X Y
Mean SD Mean SD Mean SD Mean SD
a a b b c c d d
12 1 14 2 10 0.3 18 0.1
11 2 13 0.5 11 0.1 14 0.3
10 1 12 1 14 1 16 0.2