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2. The number of gaming chairs sold in a day is recorded for 100 days- The following table is obtained: Find the unbiased estimates of

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2. The number of gaming chairs sold in a day is recorded for 100 days- The following table is obtained: Find the unbiased estimates of the mean and variance of the number of gaming chairs sold. (4 marks) Find the probability that the mean number of gaming chairs sold per day is less than 4 over a period of 30 days. (4 marks)

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