Non parametric statistics

1) The median age of the onset of diabetes is thought to be 45 years. The ages at onset of a random sample of 16 people with diabetes are: 26.2 30.5 35.5 38.0 39.8 40.3 45.0 45.6 45.9 46.8 48.9 51.4 52.4 55.6 60.9 65.4 Perform the (a) Sign test, (b) Wilcoxon signed-rank test, to determine if there is any evidence to conclude that the median age of the onset of diabetes differs significantly from 45 years. Take a = 0.05