Khan/khan-exercises — Issue #11980: Standard deviation - Standard Deviation
Author: KhanBugz
Created: 2012-01-24 07:01:29+00:00
State: open
Labels: firefox, snowleo, wrong-or-unclear

Correct answer is 9.3
Solution shows 8.5

[standard_deviation.html?seed=69&problem=population](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/standard_deviation.html?seed=69&problem=population&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/standard_deviation.html?seed=69&problem=population&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%2211.3%5C%22%2C%5C%229.3%5C%22%5D%22%2C25%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%5D)

[["11.3","9.3"]]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

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