Life times of one brand of light bulb were observed. Life hours of nine light bulbs were 898, 720, 354, 405, 620, 54, 229, 306, 890. There were three more light bulbs that were still burning after 1000 hours. It is common to assume the life time of a light bulb follows an exponential distribution. With the observed data find the MLE of the parameter of the exponential distribution with EM algorithm.
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