Probablity

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Please tutor show your work, step by step. Thanks Document Preview: Fundamentals of Biostatistics for Health Professionals – Summer 2014 HSD 269-H81A Instructor: Claude Joseph Homework II I. Suppose an influenza epidemic strikes a city. In 10% of families the mother has influenza
in 10% of families the father has influenza
and in 2% of families both the mother and father have influenza. a. Are the events A1 = {mother has influence} and A2 = {father has influenza} independent? II. The following table gives a two-way classification, based on gender and employment status, of the civilian labor force age 16 to 24 years as of July 2002. The numbers in the table are in thousands. a. If one person is selected at random from these young persons, find the probability that this person is i. unemployed ii. a female iii. employed given the person is male iv. a female given the person is unemployed b. Are the events “employed” and “unemployed” mutually exclusive? What about the events “unemployed” and “male”? c. Are the events “female” and “employed” independent? Why or why not? III. A random sample of 250 juniors majoring in psychology or communications at a large university is selected. The students are asked whether or not they are happy with their majors. The following table gives the results of the survey. Assume that none of these 250 students is majoring in two areas a. If one student is selected at random from this group, find the probability that this student is i. happy with the choice of major ii. a psychology major iii. a communications major given that the student is happy with the choice of major iv. unhappy with the choice of major given that the student is a psychology major v. a psychology major and is happy with that major vi. a communications major or is unhappy with his or her major b. Are the events “psychology major” and “happy with major” independent? Are they mutually exclusive? Explain why or why not. IV. A group of 2000 randomly selected adults were asked if they are in favor of or against cloning. The following... Attachments: Probablity.pdf Jun 11 2014 01:42 AM

 

Solution ID:609240 | This paper was updated on 26-Nov-2015

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