Match List-I with List-II
Let X be a discrete random variable and $P(X=x_i)=p_i$.
| List-I | List-II | ||
| A | E(X) | I | $∑x^2_ip_i-(∑x_ip_i)^2$ |
| B | $E(X^2)$ | II | $∑x_ip_i$ |
| C | $σ^2_x$ (Variance) | III | $\sqrt{∑x^2_ip_i-(∑x_ip_i)^2}$ |
| D | $σ_x$ (Standard Deviation ) | IV | $∑x_i^2p_i$ |
Choose the correct answer from the options given below :
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A-II, B-IV, C-I, D-III
| List-I | List-II | ||
| A | E(X) | II. | $∑x_ip_i$ |
| B | $E(X^2)$ | IV. | $∑x_i^2p_i$ |
| C | $σ^2_x$ (Variance) | I. | $∑x^2_ip_i-(∑x_ip_i)^2$ |
| D | $σ_x$ (Standard Deviation ) | III. | $\sqrt{∑x^2_ip_i-(∑x_ip_i)^2}$ |