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Probability Exercise on HIV Testing Survey Data

Explore probabilities of number of adults tested for HIV in sample. Calculate mean and variance. Practice from Basic Concepts and Methodology for the Health Sciences.

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Probability Exercise on HIV Testing Survey Data

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  1. Excercices: Q4.3.4: Page 111 The same survey data base cited shows that 32 percent of U.S adults indicated that they have been tested for HIV at some points in their life .Consider a simple random sample of 15 adults selected at that time .Find the probability that the number of adults who have been tested for HIV in the sample would be: Text Book : Basic Concepts and Methodology for the Health Sciences

  2. Solutionn=15 , p= 0.32 ,q= 1-p=0.68 Text Book : Basic Concepts and Methodology for the Health Sciences

  3. (a) Three (Ans. 0.1457) • (b) Less than two (Ans. 0.02477) (c ) At most one (Ans. 0.02477) • (d) At least three (Ans. 0.9038) (e) between three and five ,inclusive. Text Book : Basic Concepts and Methodology for the Health Sciences

  4. Q4.3.5 • refer to Q4.3.4 , find the mean and the variance? • (Answer: mean = 4.8 , • variance =3.264 • Standard deviation= 1.807 • ) Text Book : Basic Concepts and Methodology for the Health Sciences

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