7.33 Alzheimer’s According to the Alzheimer’s Association,2 as of 2014 Alzheimer’s disease affects 1 in 9 Americans over the age of 65. A study is planned of health problems the elderly face. For a random sample of Americans over the age of 65, report the shape, mean, and standard deviation of the sampling distribution of the proportion who suffer from Alzheimer’s disease, if the sample size is

(a) 200 and

(b) 800.