Question: Find the expected value, standard deviation, and variance for the data below. Probability Rx Ry 20% 9.00 9.65 30% -5.00 -4.00 25% 8.50 12.50 25%
Find the expected value, standard deviation, and variance for the data below.
| Probability | Rx | Ry |
| 20% | 9.00 | 9.65 |
| 30% | -5.00 | -4.00 |
| 25% | 8.50 | 12.50 |
| 25% | 8.00 | 9.57 |
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