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# Excercices: - PowerPoint PPT Presentation

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

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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

Solutionn=15 , p= 0.32 ,q= 1-p=0.68

Text Book : Basic Concepts and Methodology for the Health Sciences

• (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

• 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