16.3 The inspector general for a large state’s motor vehicle department decided to collect some data on recent driving tests. The idea was to see if scores on the driving test (dependent scale variable) were significantly different for male and female (nominal independent variable)

instructors. He also wanted to know if the time of day the test was given might also influence the scores. He first randomly picked two instructors and then collected data on recent tests they had administered. Time of day that the test was given was categorized as either early morning or late afternoon (the second nominal independent variable). He decided to randomly select six morning and six afternoon tests for each of his picked instructors. In the end, he had four unique groups consisting of six test takers each. You must write the null and alternative hypotheses and then select the correct test, interpret the results, and answer the inspector’s questions. The data are given below.