The researchers followed 3 participants in a 5 year study. Begin by calculating the person-time for each participant. Then, calculate the total person-time by adding up the three individual person-times. If you find it helpful, you might want to create a graph to help visualize this information. What is the total person-time in this study?Participant 1: Year 1: follow-up, Year 2: lost to follow-up at the end of the yearParticipant 2: Year 1: follow-up, Year 2: follow-up, Year 3: follow-up, Year 4: disease at the end of the yearParticipant 3: Year 1: no observation, Year 2: follow-up, Year 3: follow-up, Year 4: follow-up, Year 5: death at the end of the year10 years 8 years 7 years 15 years

Think back to the example study earlier in this lecture. The researchers followed 3 participants in a 5 year study. You have already calculated the total person-time and found out that it is 10 years. During the study, there was one case of the disease. Calculate the rate. 101.13.33

Use the following diagram. Assume that the horizontal lines in the diagramrepresent duration of illness in 8 different people, out of a community of 700.• Three people became ill in June. Of them, two recovered in July and one inAugust. Five additional persons became ill in July; two of them recovered thatmonth and three recovered in August

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; 34Researcher 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; 29Complete the tables using the data provided. (Enter exact numbers as integers, fractions, or decimals.)Researcher ASurvival Length(in months) Frequency RelativeFrequency Cumulative RelativeFrequency0.5-6.5 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 Researcher BSurvival Length(in months) Frequency RelativeFrequency Cumulative RelativeFrequency0.5-6.5 6.5-12.5 12.5-18.5 18.5-24.5 24.5-30.5 30.5-36.5 36.5-45.5

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; 34Researcher 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; 29Complete the tables using the data provided. (Enter exact numbers as integers, fractions, or decimals.)

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; 34Researcher 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; 29Suppose that the first researcher conducted his survey by randomly choosing one state in the nation and then randomly picking 40 patients from that state. What sampling method would that researcher have used?