1.25 A drug manufacturer is interested in the proportion of persons who have hypertension (elevated blood pressure) whose condition can be controlled by a new drug the company has developed.

A study involving 5000 individuals with hypertension is conducted, and it is found that 80% of the individuals are able to control their hypertension with the drug. Assuming that the 5000 individuals are representative of the group who have hypertension, answer the following questions:

a. What is the population?

b. What is the sample?

c. Identify the parameter of interest.

d. Identify the statistic and give its value.

e. Do we know the value of the parameter?