Answer to Question #242916 in Math for Wilfred

Question

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-ranks 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 α = 0.05