Explain why each of the following statements 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 numbers you assign to the dichotomous variable.