1. Find the missing value indicated by (A) to make this a valid discrete probability distribution.
x | -10 | 30 | 50 | 90 | 100 |
P(X=x) | 0.05 | 0.10 | 0.25 | 0.15 | A |
2. Calculate the mean of the random variable associated with the
following discrete probability distribution. Do not round your
answer.
x | -1 | 0 | 1 |
P(X=x) | 0.5 | 0.2 | 0.3 |
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