Here is a dataset for mortality due to work-related injuries among African American women in the United States during 1997: {15–24 years (9); 25–34 years (12); 35–44 years (15); 45–54 years (7); 55–64 years (5)}.

a. Identify the modal class.

b. Calculate the estimated median.

c. Assume that the data are for a finite population and compute the variance.

d. Assume the data are for a sample and compute the variance.