Question: Find the standard deviation: need to separately calculate the mean for groups 1~8 and 9-15 (i.e., strategies 1 and 2). Of course, you should also

Find the standard deviation: need to separately calculate the mean for groups 1~8 and 9-15 (i.e., strategies 1 and 2). Of course, you should also calculate the STD for strategies 1 and 2 separately.

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