S479 F09 Quiz 10

S479 F09 Quiz 10 - Thirty laptops malfunction during the...

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Stat 479 Fall 2009 Quiz 10 December 3, 2009 1. You have the following sample from a distribution: 6, 6, 8, 10, 10, 10, 14, 14, 16, 19 θ M is the estimated parameter for an exponential distribution using the Method of Moments. θ P is the estimated parameter for an exponential distribution using the Method of Percentile Matching using the 60 th percentile. Calculate 1000(θ P – θ M ).
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2. One hundred laptop computers are observed for a period of 12 months.
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Unformatted text preview: Thirty laptops malfunction during the observation period, with the following distribution: Time Till Malfunction in Months Number of Malfunctions 1 8 2 6 3 0 4 0 5 1 6 0 7 1 8 2 9 2 10 3 11 3 12 4 The remaining seventy laptops are still functioning at the end of 12 months. The lifetime of a laptop is believed to follow an exponential survival function with mean of . Calculate the maximum likelihood estimate of ....
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S479 F09 Quiz 10 - Thirty laptops malfunction during the...

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