Question: Next, the probability distribution of a random variable x is presented. x f ( x ) 20 0.35 25 0.10 30 0.15 35 0.40 Answer:

  1. Next, the probability distribution of a random variable x is presented.

x

f (x)

20

0.35

25

0.10

30

0.15

35

0.40

Answer:

a) Is this distribution valid, that is, is it considered a probability distribution? Explain. (2 points)

b) What is the probability that x = 30? (1 point)

c) What is the probability that x is less than or equal to 25? (1 point)

d) What is the probability that x is greater than 30?(1 point)

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