If the mean of the numbers 0, (x+2), (3x+6), and (4x+8) is 4, find their mean deviation.
Question 1 Report
If the mean of the numbers 0, (x+2), (3x+6), and (4x+8) is 4, find their mean deviation.
Answer Details
The mean deviation of a set of numbers is the average of the absolute deviations from their mean.
To find the mean deviation of the given set of numbers, we need to first find their mean.
Mean = (0 + (x+2) + (3x+6) + (4x+8))/4
Mean = (8x + 16)/4
Mean = 2x + 4
We are given that the mean is 4. Therefore,
2x + 4 = 4
2x = 0
x = 0
Substituting x = 0 in the set of numbers, we get:
0, 2, 6, 8
Mean = (0+2+6+8)/4 = 4
To find the mean deviation, we need to find the deviation of each number from the mean and then take the average of their absolute values.
Deviations from the mean:
0-4 = -4
2-4 = -2
6-4 = 2
8-4 = 4
Mean deviation = (|-4| + |-2| + |2| + |4|)/4
Mean deviation = (12/4)
Mean deviation = 3
Therefore, the answer is 3.
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