Question: The sexual function scores at six weeks were compared to those at 6 months for the patients who were taking Viagra. Use the most appropriate nonparametric technique to determine if there is evidence that there is a change in these patients’ level of sexual function. At the \[\alpha =0.05\] level of significance, test whether the Viagra resulted in higher levels of sexual function from 6 weeks to six months. Base your conclusion on the results of the Wilcoxon Matched-Pairs Signed Rank Test. (5 Marks)