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 older and younger adults. Age Sample Size Sample Mean Sample SD Older 27 802 115 Younger 17 770 73 Assume that both stance duration distributions are normal. A button hyperlink to the SALT program that reads: Use SALT. (a) Calculate a 99% CI for true average stance duration among elderly individuals. (Round your answers to one decimal place.) , ms