The mean deviation of the data 2, 9,9, 3, 6, 9, 4 from the mean is:
1. Find the mean of all values
$$=\frac{2+9+9+3+6+9+4}{7}$$
$$mean=6$$
2. Find the distance of each value from that mean (subtract the mean from each value, ignore minus signs)
3. Then find the mean of those distances
$$mean deviation=\frac{4+3+3+3+0+3+2}{7}$$
$$mean deviation=\frac{18}{7}$$
Create a FREE account and get:
