Question
The random variable X can take on the values 3, 4, and 5, and the random variable Y can take on the values 1, 2,
The random variable X can take on the values 3, 4, and 5, and the random variable Y can take on the values
1, 2, and 3. The joint probability distribution of X and Y is given in the following table:
Y
3 4 5
X
1 0.10 0.10 0.10
2 0.10 0.20 0.10
3 0.10 0.05 0.15
2.A. Describe in words and notation the event that has probability 0.15 in the table. .
2.b. _______________Calculate the marginal distribution of X.
2.C Calculate the population mean of X.
2.d. _______________ Calculate the population variance of X.
2.e. _______________ Graph the probability distribution and show the mean in the graph.
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