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exam2.reviewproblems

exam2.reviewproblems - TEST 2 REVIEW PROBLEMS PH6450 What...

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TEST 2 REVIEW PROBLEMS – PH6450 1 What is the appropriate test? [Examples adapted from: Moore and McCabe, Introduction to the Practice of Statistics ; Diane Essex-Sorlie, Medical Biostatistics and Epidemiology ; Glanz, Primer of Biostatistics, and Blair and Taylor, Biostatistics for the Health Sciences ] For each scenario below: 1. Identify the sample or samples and how they are formed. 2. Indicate the type of outcome variable (categorical, continuous). If the outcome is categorical indicate if it is dichotomous, ordinal or nominal. 3. Choose an appropriate test. Normal approximation to the binomial (for counts, one proportion, or the difference of proportions). Plus Four CI (one proportion, or the difference of proportions). Binomial exact test (for counts) Z or T test (one mean, paired or difference of means) Confidence Interval for a RR or OR 4. Solve the problem
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TEST 2 REVIEW PROBLEMS – PH6450 2 A. Two pediatricians wish to test the effectiveness of an educational program that provides information to parents about the benefits of childhood immunizations. The researchers hypothesize that parents who participate in the program are more likely to have their children immunized, verses parents who do not participate. Two samples of parents and their children are formed randomly from records of a family practice clinic. One sample of parents participates in the program. Of the 93 parents who participate, 73 go on to obtain a full set of immunizations for their child. Of the 71 parents who do not participate in the program, 30 go on to obtain a complete set of immunizations for their child.
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TEST 2 REVIEW PROBLEMS – PH6450 3 B. A dermatologist observes a frequent number of patients with a shingles like rash in a short amount of time following the opening of the local county fair. He suspects that something happened at the county fair that might be associated with this rash.
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