Dear friends,
 
i've a little problem with a study about mediation. I will call my dependent variable "Y", the independent "X" and "Z" will be my mediator variable...
 
Using a linear regression, i can say that there isn't a direct effect of X on Y because the coefficient of X isn't significative, but i've tried to use anyway the Sobel's test to find a mediation relation.
The result was positive, and with a p-value of 0.03 i can say that Z have a mediator effect on the relation between X and Y.
 
Now my question: is right think about a mediator effect of Z on the relation between X and Y, also if there isn't a direct effect????
 
Waiting for your opinion, thank you so much.
 
Costantino Milanese
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