Solution
Standard deviation = $$\sqrt{\ \frac{\Sigma\ \left(x-y\right)^2}{N-1}}=\sqrt{\ \frac{20}{4}}=2.24$$.
Create a FREE account and get:
- Download RRB Study Material PDF
- 45+ RRB previous papers with solutions PDF
- 300+ Online RRB Tests for Free
Sign in
Please select an account to continue using cracku.in
↓ →
Standard deviation = $$\sqrt{\ \frac{\Sigma\ \left(x-y\right)^2}{N-1}}=\sqrt{\ \frac{20}{4}}=2.24$$.
Create a FREE account and get:
