Unformatted text preview: 990.
The statement must be backed up by appropriate graphs, such as two histograms (with
appropriate scales) or two boxplots.
Histograms NOTE: If the student just uses the default intervals on the calculator, they will get odd looking
histograms. (This is a minus.) Copyright © 2002 by College Entrance Examination Board. All rights reserved.
Advanced Placement Program and AP are registered trademarks of the College Entrance Examination Board. 21 AP® STATISTICS
2002 SCORING GUIDELINES (Form B)
Question 6 (cont’d.)
Other acceptable graphs include:
Boxplots: Segmented Bar Graph
0% 1990 2000 Scoring
Part (a) is
Essentially correct if
All four parts of the test are essentially correct (except minor arithmetic errors).
Since there are so many parts, do not count off if degrees of freedom are omitted.
Not defining µ1 and µ2 is a minus.
Almost essentially correct if
Three parts are essentially correct and communication is very good.
Partially correct if
Two or three of the parts of the test are essentially correct.
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