Question

Question 13 of 16 1.0 Points Click to see additional instructions Consider the following probability distribution function: x 0 1 4 ? 3 P(x) 0.1 0.2 0.20 0.20 0.30 The variance of X is: Note: Round any intermediate steps to at least 4 decimal places, if necessary (e.g. 0.1234). Round your final answer to 2 decimal places, if necessary (e.g. 1.23). Do not write your answer in fractions (e.g. 2/3) or percent (50%). Mark for Review What's This?

Answer 1

Answer: Elx) = Eje pove) oplo) + IPI)) + 2 P12)+3P13) +4214) = 010.1) + 160.2) +210.20) +310.20)7410.30) E(X) =24 Elx) = 2.4 E(+²) = {xe² ploe) = ?P10)+12P11) + 22 P12) + 3?P13+22214) - 010.1) +1(0.2) + 410-20) + 9(0-20) +16(0.30) E(x²) = 7.6 vonante (*)= E(x2) - LE (X)]? 7.6-[2.47² variance (x) = 1.84 The variance of x is 1.84