The duration of time from first exposure to HIV infection to AIDS diagnosis is called the incubation period. The incubation periods of a random sample of 5 HIV infected individuals are given below (in years): PATIENT NUMBER YEARS 1 10.5 2 12.0 3 12.5 4 13.5 5 7.2
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5 + 12.0 + 12.5 + 13.5 + 7.2 Sum = 55.7 Show more…
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'Use the Empirical Rule (68-95-99.7) to identify the interval: The time between infection with the HIV virus and developing AIDS follows a normal distribution with mean of 8 years and standard deviation of 2 years. Find the time interval in which 95% of those who have been infected with the HIV virus will develop AIDS_ from 4 to 12 years from 5 to 11 years from 2 to 14 years from 3 to 13 years from 6 to 10 years'
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Incubation period: time between the infection and occurrence of the first symptoms; consider COVID-19 and all of the factors that relate to it and how it affects the incubation period. a) Virulence of the infective agent b) Infective dose c) State & health of patient's immune system d) Nature & generation time of pathogen e) Site of infection
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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; 18; 47; 33; 34 Andrew Gelman, “Open Data and Open Methods,” Ethics and Statistics, http://www.stat.columbia.edu/~gelman/research/ published/ChanceEthics1.pdf (accessed May 1, 2013). 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. Variable
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