Concept explainers
To calculate the Z score for Cobb, William and Brett and also explain who scored well.
Answer to Problem 20E
William performed best in the decade as the Williams’ Z score is highest among all three.
Explanation of Solution
Given:
Decade | Mean | Standard deviation |
1910s | 0.266 | 0.0371 |
1940s | 0.267 | 0.0326 |
1970s | 0.261 | 0.0317 |
Formula used:
Calculation:
Standardized score:
The Z score for William is higher than the Cobb and Brett therefore the score of William performed best in the decade.
Chapter 2 Solutions
EBK PRACTICE OF STAT.F/AP EXAM,UPDATED
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