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Unformatted text preview: EXTRA CREDIT Name: ------------------------------------ 1. A simple random sample of 49 CUNM students participated in a blind taste test of two brands of cola: brand "A" and brand /lB". Of these students, 29 preferred brand "A". (a) (2pts) Explain in words what the parameter pis. (b) (2pts) Give the numerical value of the statistic "p-hat" (rounded to two decimal places) that estimates p. (c) (2pts) Give a 99% confidence interval for p. (d) Is this evidence that a majority (Le. over 50%) of CUNM students prefer brand "A" cola? State hypotheses, calculate the test statistic, determine the P-value, and state your conclusion in terms of the problem. (d!) (2pts) State your hypotheses (d2) (2pts) Calculate the test statistic (d3) (2pts) Find the p-value ((d4) (2pts) State your conclusion in terms ofthe problem at the 5% test level, Le. ((=.05. 2. The proportion of drivers who use seat belts depends on things like age, gender, ethnicity, and local law. As part of a broader study, investigators obserVed a random sample of 117 female Hispanic drivers in Boston; 65...
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This note was uploaded on 12/04/2011 for the course ECONOMICS 201 taught by Professor Rcollier during the Spring '10 term at Portland CC.
- Spring '10