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Please answer the following question: 2. A manufacturer of rechargeable batteries tests 10 batteries at random and records the time it takes, in minutes, to

Please answer the following question:

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2. A manufacturer of rechargeable batteries tests 10 batteries at random and records the time it takes, in minutes, to drain each battery after a full charge has been applied. 195, 203, 177, 186, 191, 225, 216, 202, 197, 21 For the data above find the following to 2 decimal places: a. the range (1 mark) b. the mean (1 mark) c. the variance (3 marks) d. the standard deviation (1 mark)

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