Solution
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
$$mean deviation=\frac{4+3+3+3+0+3+2}{7}$$
$$mean deviation=\frac{18}{7}$$
Get AI Help
Create a FREE account and get:
- Download RRB Study Material PDF
- 45+ RRB previous papers with solutions PDF
- 300+ Online RRB Tests for Free
