posted by Susie on .
A researcher wants to study the effect of gender on mathematical ability of lyceum children. From the data gathered tried to construct a scatter diagram. He did not succeed to make it though. Why?
a. Had not collected enough data.
b. He did not know how to construct it.
c. It was not clear what was the criterion variable and what the predictive variable in this case.
d. Since both variables are not quantitative.
This is d right?