Florence Nightingale (1820-1910) is mostly known because of her work as a nurse during the Crimean War and her contribution to the reform in sanitary conditions at military hospitals. She is considered the mother of modern nursing and the creator of the first conceptual model of nursing. From a very young age she stood out in mathematics, and later on she applied her knowledge on statistics to epidemiology and to health statistics. She was the first woman to be admitted at the British Royal Statistical Society, and she was an honorary member of the American Statistical Association.

Here is a problem that connects two aspects: statistics and health.

The following data on people suffering from AIDS was collected in a certain region.

a)    Conduct a statistical study that contemplates frequency table and charts.

b)    Extract your own reasoned conclusions from the study.