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Unformatted text preview: of flexibility ratings for middleaged men
"is normal", some qualification must be given, i.e. “approximately Normal”.
Partially correct if interpretation is correct but not in context
or
correct comparison of the two groups is made only on the
basis of one of center, shape or spread
or
correct comparison of the two groups is made on at least
two of center, shape and spread but communication is
weak.
or
at least two of the same individual descriptions in both
groups (e.g. center and shape) but no direct comparison
between the two groups. 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
Incorrect if response fails to compare the two groups on any of
center, shape or spread (e.g. only compares the two groups
for one value of the flexibility ratings.) If a display that uses the frequencies as data is done in part (a), no credit is given in part (a)
(e.g. frequency boxplots, or frequency vs. frequency/ frequency vs. flexibility scatterplots).
However, if a student attempts an interpretation, and they do a credible job with the
interpretation, part (b) can be scored as partially correct (resulting in a score of 1 for the
problem). For example if a student says that there is a “positive linear relationship” or that
center, shape and spread are similar because stem and leaf displays of the frequencies look
similar, this is a credible interpretation. 4 Complete Response
Essentially correct on both parts. 3 Substantial Response
Essentially correct on one part and partially correct on the other. 2 Developing Response
Essentially correct on one part and incorrect on the other
OR
Partially correct on both parts 1 Minimal Response
Partially correct on one part
A paper using the frequencies as data can receive at most a 1. 0 No credit Copyright © 2000 College Entrance Examination Board and Educational Testing Service. All rights reserved.
AP is a registered tradem...
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 Spring '13
 Mosby
 Statistics, AP Statistics

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