Mention a causal factor which is a treatment side

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Unformatted text preview: nt to either: • merely mention lurking and/or confounding variables without indicating how they are confounded with the formation of the groups. • mention a causal factor which is a treatment “side effect”, e.g. that walkers may contain plastics which are toxic to children. Copyright © 2000 College Entrance Examination Board and Educational Testing Service. All rights reserved. AP is a registered trademark of the College Entrance Examination Board. AP® Statistics 2000 ─ Scoring Guidelines Question 4 continued Scoring Part (a) is evaluated based on the four parts of the test. Each part must be COMPLETELY correct (except for minor arithmetical errors in part 3) to consider the part correct. Part (b) is either correct or incorrect. If a student just answers “no” without giving a correct explanation that relates to the design of the study, part (b) is incorrect. Note: A 1-sided test can earn, at most, a score of 3. 4 Complete Response All four parts of the hypothesis test in part (a) correct and part (b) correct. (4-E) (4 parts correct in (a) -- Correct in (b)) 3 Substantial Response All four parts of the hypothesis test in part (a) correct and part (b) incorrect (4-I) OR Three parts of the hypothesis test in part (a) correct and part (b) correct. (3-E) 2 Developing Response Two parts of the hypothesis test in part (a) correct and part (b) correct. (2-E) OR Three parts of the hypothesis test in part (a) correct and part (b) incorrect. (3-I) Note: For papers judged a 2 because a one-tailed test is done and assumptions are not checked, exceptionally strong answers to the rest of the problem can be used to score the paper a “holistic” 3. 1 Minimal Response Two parts of the hypothesis test in part (a) correct and part (b) incorrect (2-I) OR None or one part of the test in part (a) correct and part (b) correct. (0-E or 1-E) 0 No credit Note that a 1-I earns a score of 0. Copyright © 2000 College Entrance Examination Board and Educational Testing Service. All rights reserved. AP is a registered trade...
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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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