In 2011, the institute of medicine (iom), a non-profit group affiliated with the select one us national academy of sciences, reviewed a study measuring bone quality 10 points and levels of vitamin-d in a random sample from bodies of 675 people who died in good health. 8.5% of the 82 bodies with low vitamin-d levels (below 50 nmol/l) had weak bones. comparatively, 1% of the 593 bodies with regular vitamin-d levels had weak bones. is a normal model a good fit for the sampling distribution? a. yes, there are close to equal numbers in each group. b. o yes, there are at least 10 people with weak bones and 10 people with strong bones in each group. c. o no, the groups are not the same size. d. o no, there are not at least 10 people with weak bones and 10 people with strong bones in each group.