Question: This is an aleatory probability table... x f(x) 20 0.35 25 0.10 30 0.15 35 0.40 questions is the distribution valid? is considered a probability

This is an aleatory probability table...

x f(x)

20 0.35

25 0.10

30 0.15

35 0.40

questions

  1. is the distribution valid? is considered a probability of distribution?
  2. what is the probability that x=30?
  3. what is the probability that x is less or equal than 25?
  4. what is the probability that x > 30?
  5. what is the variance?
  6. what is the mean?
  7. what is the standard deviation?

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