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Mathematics, 08.07.2019 13:50 bvallinab
The following table gives the scores of 30 students in a mathematics examination. scores 90–99 80–89 70–79 60–69 50–59 students 3 7 12 4 4 find the mean and the standard deviation of the given data. hint: assume that all scores lying within a group interval take the middle value of that group. (round your answers to two decimal places.)
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The following table gives the scores of 30 students in a mathematics examination. scores 90–99 80–89...
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