Studies are often done by pharmaceutical companies to determine the effectivenes
ID: 3354477 • Letter: S
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 starting the treatment. Two researchers each follow a different set of 40 AIDS patients 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; 18; 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 Complete the tables using the data provided. (Enter exact numbers as integers, fractions, or decimals.)
Complete the tables using the data provided. (Enter exact numbers as integers, fractions, or decimals.)
Researcher A
Researcher B
Survival Length(in months) Frequency Relative
Frequency Cumulative Relative
Frequency 0.5-6.5 6.5-12.5 12.5-18.5 18.5-24.5 24.5-30.5 30.5-36.5 36.5-42.5 42.5-48.5
Explanation / Answer
researcher A:
researcher B:
survival length frequency relative frequency cumulative relative frequency 0.5-6.5 2 0.05 2 6.5-12.5 5 0.125 7 12.5-18.5 9 0.225 16 18.5-24.5 5 0.125 21 24.5-30.5 7 0.175 28 30.5-36.5 7 0.175 35 36.5-42.5 2 0.05 37 42.5-48.5 3 0.075 40 40