Concept explainers
(a)
To find: the
(a)
Answer to Problem 19E
The new mean is 87.188 and the new median is 87.5.
Explanation of Solution
Given:
Calculation:
The new mean and the new median both increase by 18 and is obtained below.
The new mean is 87.188 and the new median is 87.5.
Conclusion:
Therefore, the new mean is 87.188 and the new median is 87.5.
(b)
To find: the standard deviation and IQR of the measurements.
(b)
Answer to Problem 19E
The deviations did not change and the IQR,
Explanation of Solution
For the standard deviation, while the mean increased by 18, the observations each increased by 18 as well so that the deviations did not change. For the IQR,
Chapter 2 Solutions
The Practice of Statistics for AP - 4th Edition
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