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3. (a) Calculate the mean and variance of the following data set: X = {1.2,5.4,5,6,5.8,5.9, 6.1,6.3, 6.4, 6.5, 28.8}. Do you think that the mean

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3. (a) Calculate the mean and variance of the following data set: X = {1.2,5.4,5,6,5.8,5.9, 6.1,6.3, 6.4, 6.5, 28.8}. Do you think that the mean and variance are representative of the location and spread respectively? Justify your answer. What other summary statistics could you use to describe the location and spread? [10 marks]

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