The table below shows the probability distribution of the random variable X. a. Find the mean of the random variable. b. Obtain the standard deviation ? of the random variable. x 1 2 3 P(X = x) 0.3 0.4 0.3 a. Find the mean of the random variable. ? = ? (Round to two decimal places as needed.) b. Obtain the standard deviation ? of the random variable. ? = ? (Round to two decimal places as needed.)
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Given the probability distribution: P(X=1) = 0.3 P(X=2) = 0.4 P(X=3) = 0.3 Mean = 1*0.3 + 2*0.4 + 3*0.3 Mean = 0.3 + 0.8 + 0.9 Mean = 2 Show more…
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