Bricks have weights that have a mean 250 and a standard deviation 4. (a) Suppose X is
Question:
(a) Suppose X is the weight of a randomly chosen brick. Let Y = c + dX. What are the values of C and d such that Y has a mean 100 and a standard deviation 1.
(b) Suppose 10 bricks are chosen at random. What are the mean and the standard deviation of the total weight of these 10 bricks?
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a 100 E Y c dE X c d 250 1 Var Y d 2 Var ...View the full answer
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Related Book For 
Probability And Statistics For Engineers And Scientists
ISBN: 9780495107576
3rd Edition
Authors: Anthony Hayter
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