Question

If a researcher reported for an independent-groups t test that t(12) = 3.66, p < .01, how many subjects were there in the study?

Answer 1

Here it is given that independent t test is being applied on 2 groups.

As we know that t test in independent groups test follow t distribution with df

i.e.,

where  

is the sample size of group 1

is the smaple size of group 2

So here

it is given that t follows t with 12 df

So there are

14 subjects in the study.