What do you use when you want to see if a sample is probably from a population? Or, what what do you use to test a Research Hypothesis that a sample of people who do all of the practice exercises in ...What do you use when you want to see if a sample is probably from a population? Or, what what do you use to test a Research Hypothesis that a sample of people who do all of the practice exercises in this textbook will earn more points in their behavioral statistics class than the population of students taking behavioral statistics?