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MrBibbers:
Priya is playing a game where she earns online badges for scoring higher than the mean score on a level. After the tenth level, she scores 3,540 points, which is 2 standard deviations above the mean score of 3,110 points. What is the standard deviation of scores for the tenth level? 215 311 354 430
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Ultrilliam:
215
Ultrilliam:
(3540-3110)/2
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