Question

Mean deviation from the mean for the set of observations -1,0,4

Answer 1

check the Attachment

Answer 2

Mean Deviation is 2

Step-by-step explanation:

• Adding all the numbers initially and dividing by total number is what we call as Average of Mean of the numbers.  

or $\frac {Sum}{Count}$

• Definition of mean deviation : the mean of the absolute values of the numerical differences between the numbers of a set (such as statistical data) and their mean or median.

Mean = $\frac {-1 + 0 + 4}{3}$

= $\frac {3}{3}$

= 1

Mean Deviation = $\frac {1-(-1) + (1-0) + (4-1)}{3}$

= $\frac {2+1+3}{3}$

= 2