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For 98 randomly selected college students, the following exam score frequency distribution was obtained. Class Frequency 100 - 5 108 109 - 18 117

For 98 randomly selected college students, the following exam score frequency distribution was obtained. Class Frequency 100 - 5 108 109 - 18 117 118- 42 126 127 - 25 135 136 - 144 8 What is the standard deviation of these grouped data? 67.9 O 7.9 8.8 77.9

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