Vitamin D 2012 In 2012, the American Journal of Clinical Nutrition reported that 31% of Australian adults over age 25 have a vitamin D deficiency. The data came from the AusDiab study of 11,218...

Vitamin D 2012 In 2012, the American Journal of Clinical Nutrition reported that 31% of Australian adults over age 25 have a vitamin D deficiency. The data came from the AusDiab study of 11,218 Australians.

a) Do these data meet the assumptions necessary for inference? What would you like to know that you don’t?

b) Create a 95% confidence interval.

c) Interpret the interval in this context.

 d) Explain in this context what “95% confidence” means.