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

Question

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

anonymous · Answer

@fakeee @AlexandervonHumboldt2 @mathmate @hartnn

mathmate · Answer

It's all here:
"After the tenth level, she scores 3,540 points, which is 2 standard deviations above the mean score of 3,110 points."

anonymous · Answer

@hartnn