
Concept explainers
(a)
The mean, median and mode of the given data.
(a)

Answer to Problem 39E
7.7
Explanation of Solution
Given:
The given data set is:
Calculation:
The frequency of the data set will be:
200×30100=60200×14100=28200×20100=40200×35100=70200×1100=2
Hence, the data set is:
2,8,40,60,70
The value of mean, median mode will be:
Mean=2+28+40+60+705=2005=40Median=40Mode = None
(b)
The outliers and the effect of outliers on mean, median and mode.
(b)

Answer to Problem 39E
Outlier = 2.
Mean and median will decrease and mode remains the same.
Explanation of Solution
Given:
The given data set is:
Calculation:
Hence, the data set is:
2,8,40,60,70
Outlier = 2.
The value of new mean, median mode will be:
Mean=28+40+60+705=1985=39.6Median=28+402=34Mode = None
Mean and median will decrease and mode remains the same.
(c)
The circle graph with the mentioned changes.
(c)

Answer to Problem 39E
The mean, median and mode will be the Psychology I class.
Explanation of Solution
Given:
The given data set is:
Calculation:
All students take the Psychology II class 1 year later.
The new circle graph will be:
The mean, median and mode will be the Psychology I class.
Chapter 7 Solutions
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