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Concept explainers
Determining
Replace n1 and n2 by n in the formula above (assuming that both samples have the same size) and replace each of p1, q1, p2, and q2 by 0.5 (because their values [ire not known). Solving for n results in this expression:
Use this expression to find the size of each sample if you want to estimate the difference between the proportions of adult men and women who are college graduates. Assume that you want 90% confidence that your error is no more than 0.02.
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Chapter 9 Solutions
Essentials of Statistics, Books a la Carte Edition (5th Edition)
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageGlencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillFunctions and Change: A Modeling Approach to Coll...AlgebraISBN:9781337111348Author:Bruce Crauder, Benny Evans, Alan NoellPublisher:Cengage Learning
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