A statistics professor implemented an online homework system for their introductory statistics courses and wanted to know whether the system improved test scores. In the Fall semester, homework was completed with pencil and paper, checking answer in the back of the book. In the Spring semester, homework was completed online - giving students instant feedback on their work. The results are summarized below. Assume that the sampled populations are normal with equal variances. Is there evidence to suggest that the online system improves test scores? Use a = 0.05. Here mu 1 = true mean score under pencil and paper system, and mu 2 = true mean score under online system. What is the research hypothesis?