Concept explainers
To find: the standardized score ( z -score) for a student
Answer to Problem 9PT
The option (e) 0.27 is the right option.
Explanation of Solution
Given:
In 1990,
Mean = 470
Standard deviation = 110
In 2009,
Mean = 515
Standard deviation = 116
Student scored 500 on old SAT scale
- -30
- -0.27
- -0.13
- 0.13
- 0.27
Calculation:
According to the old scale in 1990s, the mean score was
By definitions, the standardized score (Z-score) for a student who scored 500 on the old SAT scale is given as follows:
Conclusion:
Therefore, the option (e) 0.27 is the right option.
Chapter 2 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Elementary Statistics: Picturing the World (6th Edition)
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Basic Business Statistics, Student Value Edition
Statistics: The Art and Science of Learning from Data (4th Edition)
Essentials of Statistics, Books a la Carte Edition (5th Edition)
Elementary Statistics (13th Edition)
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