Concept explainers
a)
To find which student qualifies.
a)
Answer to Problem 15E
Megan qualifies for language honors.
Explanation of Solution
Given:
French exam:
Standard deviation =
Spanish exam:
Mean =
Standard deviation =
Anna’s scores:
Megan’s scores:
Average score of Anna:
Average score of Megan:
The average score of Megan is high, therefore Megan qualifies for language honors.
b)
To explain which student’s performance was better.
b)
Answer to Problem 15E
Anna did better performance.
Explanation of Solution
Given:
French exam:
Mean =
Standard deviation =
Spanish exam:
Mean =
Standard deviation =
Anna’s scores:
Megan’s scores:
Formula:
We need to take Sum of z-scores to judge a performance.
Sum z-score of Anna:
Sum z-score of Megan:
Average z-score of Anna is higher than Megan. Hence, Anna did better performance.
Chapter 6 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
Additional Math Textbook Solutions
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Elementary Statistics (13th Edition)
Elementary Statistics: Picturing the World (7th Edition)
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