Explain why each of the following statement is true:
a. The data from any research study that uses the t test for the difference between two independent sample means can also be analyzed by computing a point-biserial correlation coefficient.
b. Any researcher using the t test for the difference between two independent sample means should also compute a point-biserial correlation coefficient (or other measure of effect size) for the same data.
c. When computing a point-biserial correlation coefficient, it does not matter what two number you assign to the dichotomous variable.