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. Researcher A: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16, 14; 24; 25; 15; 26, 27; 33; 29; 35, 44; 13; 21; 22; 10; 12, 8; 40, 32, 26; 27; 31; 34; 29; 17; 8; 24; 47; 47; 33; 34 Researcher B: 3; 14; 11; 5; 16; 17; 28, 41; 31; 18, 14; 14; 26, 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12, 18, 41; 22, 16; 25; 33; 34; 29; 13, 18, 24; 23; 42; 33; 29 Determine what the key terms refer to in the example for Researcher A. parameter statistic population sample variable The average length of time (in months) AIDS patients live after treatment in the sample. 2. AIDS patients 3. The average length of time (in months) AIDS patients live after vealment 4. The 10 AIDS patients in the study 5. X - the length of time (in months) AIDS patients live after treatment