Concept explainers
To explain: the performance of S’s school on the PSAT?
Answer to Problem 18E
Here, 5.2% of the test takers nationally scored 65 or higher, yet about 32% scored 65 or higher at S's school.
Explanation of Solution
Given:
1.5 million college-bound high school juniors take the test.
Mean score = 46.9
Standard deviation = 10.9
5.2% of test takers earned a score of 65.
The boys at S's school did very well on the PSAT. S's score was relatively better when compared to the national group than to his peers at school. Only 5.2% of the test takers nationally scored 65 or higher, yet about 32% scored 65 or higher at S's school.
Chapter 2 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Essentials of Statistics, Books a la Carte Edition (5th Edition)
STATS:DATA+MODELS-W/DVD
Introductory Statistics (2nd Edition)
Statistics: The Art and Science of Learning from Data (4th Edition)
Elementary Statistics
Statistical Reasoning for Everyday Life (5th Edition)
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