Mathematics · Probability Theory
Let X be a random variable with the cumulative distribution function: FX(x) = • 0, if x < 0 • (x + 2)/5, if 0 ≤ x < 2 • 1, if x ≥ 2 Then, which of the following statements is true?
- 1The value of the moment generating function, MX(t), at t = 1 is e2 - 15
- 2The upper bound of P(|X - 45| ≥ 1), using Chebyshev's inequality, is 5275
- 3P(|X - 45| ≥ 1) = 1925
- 4E(X2) = 43✓
Correct answer
E(X2) = 43
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