The degenerative disease osteoarthritis most frequently affects weight-bearing joints such as the knee. An article presented the following summary data on stance duration (ms) for samples of both elderly and younger adults. Assume that both stance distributions are normal. Carry out a test of hypotheses at a significance level of 0.02 to decide whether true average stance duration is larger among elderly individuals than among younger individuals. (Use [11 for elderly individuals and pg for younger individuals.) Age n Average Standard deviation Elderly 41 800 115 ounger 40 775 74 (a) What are the null and alternative hypotheses? A A Ho: p