
Concept explainers
a.
To find the deviation of the shoe sizes sold from the average shoe size.
a.

Answer to Problem 50E
The deviations for the shoe sizes are
A positive deviation from the average size indicates that the recorded shoe size is greater than the average shoe size.
A negative deviation from the average size indicates that the recorded shoe size is smaller than the average shoe size.
Explanation of Solution
Given information:
The average women’s shoe size is
The record of the shoe sizes sold is
Calculation :
The deviation of the recorded shoe size from the average shoe size can be calculated by:
The deviations for the shoe sizes are
A positive deviation from the average size indicates that the recorded shoe size is greater than the average shoe size.
A negative deviation from the average size indicates that the recorded shoe size is smaller than the average shoe size.
b.
To find the mean of the deviation.
b.

Answer to Problem 50E
The mean of the deviation is
The store owner can conclude that the average women’s shoe size i.e.
Explanation of Solution
Given information:
The average women’s shoe size is
The record of the shoe sizes sold is
The deviations for the shoe sizes are
Formula used:
The following formula is used:
Calculation :
The mean of the deviations can be calculated by:
Hence, the mean of the deviation is
From the above mean, the store owner can conclude that the average women’s shoe size i.e.
Chapter 5 Solutions
Pre-Algebra
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