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# 9 but subtracts to get 41 incorrect if is not an

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Unformatted text preview: ut “subtracts” from the wrong number, OR if does not show work for 36.9 but subtracts to get 4.1. Incorrect if is not an expected value or does not use all six outcomes in the expected value. Part (c) is Essentially correct if correctly computes the conditional probability. Complete notation could be considered a “plus.” Partially correct if correctly computes P ( X = 36 | X < 41) = 0.46 = 0.465 or 0.99 0.46 = 0.5 or incorrectly tries to solve the conditional probability (e.g., 0.92 multiplies probabilities in numerator). P ( X = 36 | X £ 38) = Incorrect if an unconditional probability is computed. Copyright © 2002 by College Entrance Examination Board. All rights reserved. Advanced Placement Program and AP are registered trademarks of the College Entrance Examination Board. 6 AP® STATISTICS 2002 SCORING GUIDELINES (Form B) Question 2 (cont’d.) 4 Complete Response Essentially correct on all three parts. 3 Substantial Response Essentially correct on two parts and partially cor...
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