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A lifetime test is carried out on a particular type of componentA total of 10 components are observed, with failure times as follows:0.3, 7.7, 6.3, 4.2, 1.6, 5.6, 6.3, 8, 5.1, 1.7.The failure times are assumed to be iid Exponential with hazard rate λ.Determine the maximum likelihood estimate  of λ.(Give answers to 3 decimal places)

Question

A lifetime test is carried out on a particular type of componentA total of 10 components are observed, with failure times as follows:0.3, 7.7, 6.3, 4.2, 1.6, 5.6, 6.3, 8, 5.1, 1.7.The failure times are assumed to be iid Exponential with hazard rate λ.Determine the maximum likelihood estimate  of λ.(Give answers to 3 decimal places)

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Solution

The maximum likelihood estimate (MLE) of the hazard rate λ for an exponential distribution is the reciprocal of the sample mean.

First, calculate the sample mean of the failure times:

(0.3 + 7.7 + 6.3 + 4.2 + 1.6 + 5.6 + 6.3 + 8 + 5.1 + 1.7) / 10 = 4.71

Then, calculate the MLE of λ as the reciprocal of the sample mean:

λ = 1 / 4.71 = 0.212

Therefore, the maximum likelihood estimate of λ is 0.212 (correct to 3 decimal places).

This problem has been solved

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