2012Spring_Midterm

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Unformatted text preview: mpute ; [4’] Compute ; [4’] Compute ; [4’] Compute ; | |. 0.56, compute Solution: (a) Because (i) 0.7, 0.6 and 3 0.9, 0.7 0.6 0.9 (ii) 3 0.6 0.4 0.2 1 ; (iii) 3 0.7 0.4 0.4 1 ; 0.3 1 ; 2 (iv) (b) Since | 1 , 1 1 | then 1 1 0.9 | 0.1 1 ; 1 . . . 0.48 1 . 2. [20 Marks] Suppose that X, the number of items in an order to an online retailer, is a discrete random variable whose probability mass function is tabulated as follows. For the values that not listed, the corresponding probabilities are zero. x (b) (c) (d) 2 3 4 5 0.3 (a) 1 0.25 0.2 0.15 0.1 Suppose that each item weighs 2kg, and the shipping cost, Y, depends upon the total weight of the order. In particular, if the weight is less than or equ...
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This document was uploaded on 03/19/2014.

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