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Concept explainers
a.
To Find: To find the mean and mean absolute deviation of the given data.
a.
![Check Mark](/static/check-mark.png)
Answer to Problem 10IP
The mean is 5.65 and mean absolute deviation is 2.6.
Explanation of Solution
Given information: yards gained by football teams in each game
Formula used: For Mean:
Calculation:
Calculation of Mean
Thus, mean is 5.65
Now, calculation of mean absolute deviation
15.15 | ||
12.5 | 6.85 | |
17.5 | 11.85 | |
9.65 | ||
11.65 | ||
12 | 6.35 | |
8.5 | 2.85 | |
8.15 | ||
21.5 | 15.85 | |
6.5 | 0.85 |
Thus, mean absolute deviation is 2.6
Hence, the required mean and mean absolute deviation is 5 and 2.6.
b.
To Explain:To explain the reasons of mean is less than from mean absolute deviation.
b.
![Check Mark](/static/check-mark.png)
Answer to Problem 10IP
Because of negative information.
Explanation of Solution
Given information:Mean and mean absolute deviation.
In calculating mean some negative observations decrease the value of mean while in the mean absolute deviation, the negative symbols are ignored and absolute values are taken. So, it increases the value of mean absolute deviation.
Thus, because of negative observations the mean absolute deviation is greater then the mean.
Chapter 10 Solutions
Glencoe Math Accelerated, Student Edition
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