Suppose that T is a random variable with the following probability distribution: 3. Т -7 -3 1 3 f(t) 0.08 0.32 0.15 0.20 0.25 What is the probability that T is less than, or equal to 4? a. b. What is the probability that T is greater than or equal to 3? What is the expected value of T? c. d. What is the standard deviation of T?

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