Unformatted text preview: Do not need to state that random samples are used since it is in problem statement.
2. If student checks on normality and comments that the histogram does not look
normal or that a boxplot has outliers and then says the t test is not appropriate (i.e.,
fails to recognize that it is OK to proceed with a t test based on the large sample size),
part two is not correct.
3. Mentioning samples are independent is a plus.
Part (b) is
Essentially correct if
The student recognizes that part (a) does not answer the question posed and has
all four parts of the chi-square test completely 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. 22 AP® STATISTICS
2002 SCORING GUIDELINES (Form B)
Question 6 (cont’d.)
Almost essentially correct if
The student recognizes that part (a) does not answer the question posed and has three
parts essentially correct, including mechanics, and communication is very good.
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