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Unformatted text preview: ). A two factor design
that includes randomization rather than a block is considered partially correct.
Note, using the term “stratified random sample” is considered extraneous and is
not sufficient for an explanation of how randomization occurs in the new design.
Incorrect if all the response mentions is now having four groups of data to analyze. (No
randomization, not even a reference to the randomization in (a), and no clear
separation of the groups in the design.)
NOTE: If no randomization is specified anywhere, the highest possible score is a 2.
4 Complete Response
Both parts essentially correct. 3 Substantial Response
Part (a) is essentially correct and part (b) is partially correct.
Part (a) is partially correct and part (b) is essentially correct. Copyright © 2002 by College Entrance Examination Board. All rights reserved.
Advanced Placement Program and AP are registered trademarks of the College Entrance Examination Board. 10 AP® STATISTICS
2002 SCORING GUIDELINES (Form B)
Question 3 (cont’d.)
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