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Chapter 10-11

AMS 5 Chapter Notes - Chapter 10-11: Percentile Rank, Scatter Plot


Department
Applied Math and Statistics
Course Code
AMS 5
Professor
Yonatan Katznelson
Chapter
10-11

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AMS 5 Practice 8
4/18/2017
(8:00-9:05)
Chapter 10, #1, 2, 3, 5, 7, 9
1. Shown below is a scatter diagram for Math and Verbal SAT scores for graduating seniors
at a certain high school. Three areas are shaded. Match the area with the description.
(One description will be left over.)
(i) Total score (Math + Verbal) is below 800
(ii) Total score (Math + Verbal) is around 800
(iii) Math score is about equal to Verbal score.
(iv) Math score is less than Verbal score.
1a) i
1b) iii
1c) iv
2. In a study of the stability of IQ scores, a large group of individuals is tested once at age
18 and again at age 35. The following results are obtained.
age 18: average score ~ 100, SD ~ 15
age 35: average score ~ 100, SD ~ 15, r ~ 0.80
(a) Estimate the average score at age 35 for all the individuals who scored 115
at age 18.
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