Are X and Y independent?
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Suppoose X and Y are the random variables with joint PMF given by:
| x\y | 11.2 | 5.75 |
| -3 | 0 | 0.07 |
| -2 | 0.2 | 0.08 |
| -1 | 0.1 | 0.1 |
| 0 | 0.15 | 0.1 |
| 1 | 0 | 0.2 |
a.) Are X and Y independent?
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