Question

Gender	Daily Level of Exercise
	Much	Moderate	Little	Total
Male	12	57	56	125
Female	36	150	81	267
Total	48	207	137	392

1) For five women drawn at random from the student sample, the chance that none of them exercise only a little is approximately:

2) The Relative Risk of little exercise for male students relative to female students is approximately:

Answer 1

a)

hyper geometric distribution

N=667

k=81

n=5

x=0

P(X=0) = [(C(81,0)*C(667-81,5) / C(667,5) ] = 0.52234

b)

relative risk  of little exercise for male students relative to female students = (56/125)/(81/267)=1.4767