In 2012 The American Journal of Clinical Nutrition reported

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

Solution