For Exercises 7 through 12, determine whether the distribution represents a probability distribution. If it does not, state why. 7. X 3 8. 12 P(X) 0.3 0.5 0.7 -0.8 8. X 5 7 9 P(X) 0.6 0.8 -0.4 9. X -2 2 5 P(X) 0.3 0.4 0.2 0.1
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