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[3 marks] Suppose the random variable, Y, has the probability distribution, Y 1 2 3 P(Y = y) 0.57 0.27 0.16 (a) Calculate the mean,

[3 marks] Suppose the random variable, Y, has the probability distribution, Y 1 2 3 P(Y = y) 0.57 0.27 0.16

(a) Calculate the mean, and [1]

(b) the standard deviation

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