The following 4 questions (Q37 to (40) are either "True" or "False" Q37: The single-most critical component of deciding whether you are to conduct a t-test versus a z-test for hypothesis testing is whether there is a 'u'. Q38: Predicting the characteristics of an entire group, after having measured a small group, is the major goal of inferential statistics. Q39: Degrees of freedom for a single sample z-test is/are 'n-1'. Q40: Degrees of freedom for a single sample t-test is/are 'n-1