1 minimal response part a is partially correct and

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Unformatted text preview: veloping Response Both parts are partially correct. OR Part (a) is essentially correct and part (b) is correct. 1 Minimal Response Part (a) is partially correct and part (b) is incorrect. OR Part (a) is incorrect and part (b) is essentially or partially correct. NOTE: PP is between a 1 and a 2. If only the before and after design is present, it will be rounded down to a 1. Copyright © 2002 by College Entrance Examination Board. All rights reserved. Advanced Placement Program and AP are registered trademarks of the College Entrance Examination Board. 11 AP® STATISTICS 2002 SCORING GUIDELINES (Form B) Question 4 Solution Part (a): Large sample confidence interval for a population proportion. Requires large population (N > 20n) and large sample. Can consider sample large since ˆ ˆ np = 1026(.39) = 400.14 ³ 10, n(1 - p ) = 1026(.61) = 625.86 ³ 10 OR ˆ ˆ n p > 5, n(1- p ) > 5 OR ˆ p±3 ˆ ˆ p (1 - p) = .39 ± .0298 = (.3602,.4198) is within the interval (0, 1). n Computation of 95 percent confidence int...
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This note was uploaded on 09/06/2013 for the course MATH AP Statist taught by Professor Mosby during the Spring '13 term at Silverton High School, Silverton.

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