Question

Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in months patients live once they start the treatment. Two researchers each follow a different set of 40 patients with AIDS from the start of treatment until their deaths. The following data (in months) are collected.

Answer 1

The Solution:

Given:

Required:

The parameter is the average length of time (in months) AIDS patients live after treatment. [option 1]

The population is AIDS patients [option 5].

The Variable is the X = the length of time (in months) AIDS patients live after treatment [option 3].

The Sample is the 40 AIDS patients in the study [option 2].

The statistic is the average length of time (in months) AIDS patients live after treatment in the sample [option 4].