Find the mean absolute deviation of the set of data 16, 20, 24, 25, 28, 29, 31 and 35.
1) 4.80
2) 4.75
3) 4.70
4) 4.65

Question

Find the mean absolute deviation of the set of data 16, 20, 24, 25, 28, 29, 31 and 35.
	1)	4.80
	2)	4.75
	3)	4.70
	4)	4.65

directrix · Answer

Mean Absolute Deviation
The sum of the deviations from the mean will always be zero. We need to make sure that none of the deviations are negative. We can do this by squaring each deviation (as we do in the variance or standard deviation) or by taking the absolute value (as we do in the mean absolute deviation).

Procedure for finding

Find the mean of the data 
Subtract the mean from each data value to get the deviation from the mean 
Take the absolute value of each deviation from the mean 
Total the absolute values of the deviations from the mean 
Divide the total by the sample size.

directrix · Answer

That yields 4.75000 --> #2 After you learn how to do these, check out the online mean deviation calculator at the link: http://easycalculation.com/statistics/mean-absolute-deviation.php