36002 41971 interpretation of confidence interval

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Unformatted text preview: erval for one population proportion: .39 ± 1.96 (.39)(.61) = .39 ± .0298 = (.3602,.4198) 1026 If use the calculator with x = 400, get (.36002, .41971) Interpretation of confidence interval: Based on the sample, we estimate that the proportion of U.S. adults who would respond “make some changes” is between .36 and .42. OR We are 95 percent confident that the proportion of all U.S. adults who would respond “make some changes” is between .36 and .42. Interpretation of the confidence level: In the long run, 95 percent of the (different) intervals generated using this method will contain the true population proportion. OR The method used to produce this estimate has a 5 percent error rate. Copyright © 2002 by College Entrance Examination Board. All rights reserved. Advanced Placement Program and AP are registered trademarks of the College Entrance Examination Board. 12 AP® STATISTICS 2002 SCORING GUIDELINES (Form B) Question 4 (cont’d.) Part (b): The statement is misleading because in addition to the 39 percent who...
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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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