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The scores for students taking a particular exam are summarized in the following frequency distribution. Number of Score Students 91 - 100 4 81 -

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The scores for students taking a particular exam are summarized in the following frequency distribution. Number of Score Students 91 - 100 4 81 - 90 6 71 - 80 9 61 - 70 6 51 - 60 4 41 - 50 2 Use this frequency distribution to approximate the standard deviation of the scores for students taking the exam. Treat the data as population data. Round your answer to two decimal places

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