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[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

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[ACTION NAME]

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# Your action step 2

# Your action step 3

...

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A study group consisting of five students took part in a practical examination for junior high school graduates (with a full score of 100) and achieved an average score of 80. Among them, the variance of the scores for the three male students was 150 (points²), and the two female students scored 85 and 75, respectively.
(1) What is the average score of the three male students in the practical examination?
(2) Calculate the standard deviation of the practical examination scores for the five students in the study group.

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