Posted by metu on .
how to interpret two diffrent mean and standard deviation ??????????????

statistics 
PsyDAG,
What question(s) are you trying to answer?
Z = (mean1  mean2)/standard error (SE) of difference between means
SEdiff = √(SEmean1^2 + SEmean2^2)
SEm = SD/√n
If only one SD is provided, you can use just that to determine SEdiff.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to your Z score.