Unformatted text preview: 1000? (b) If the variance of a hour’s production is known to be 100, then what can be said about the probability that a hour’s production will be between 450 and 550? (c) What can be said about the probability that at least 550 widgets are made, assuming the mean is 500 and variance is 100? 3. Let X follow the exponential ( α,β ) distribution with pdf f ( x ) = 1 β e( xα ) /β for α < x < ∞ . Let Y = bX + a for some constants a and b with b > 0. Find the pdf of Y 1...
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 Spring '08
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 Probability theory, Natural logarithm, Guinness breweries

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