Khan/khan-exercises — Issue #15446: Variance - Variance is wrong
Author: KhanBugz
Created: 2012-03-05 17:22:10+00:00
State: open
Labels: ie8, wrong-or-unclear, xp

Reporter: rmohler@urbancorps.org

You forgot to use n-1, which would be 6-1, the when you divide 8124.6/5 = the variance is 1625.9

Thank you, love this program

[variance.html?seed=66&problem=population](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/variance.html?seed=66&problem=population&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/variance.html?seed=66&problem=population&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%2235.2%5C%22%2C%5C%221625.9%5C%22%5D%22%2C574%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%2C7%5D%2C%5B%22hint-activity%22%2C%220%22%2C10%5D%2C%5B%22hint-activity%22%2C%220%22%2C35%5D%2C%5B%22hint-activity%22%2C%220%22%2C41%5D%2C%5B%22hint-activity%22%2C%220%22%2C43%5D%2C%5B%22hint-activity%22%2C%220%22%2C44%5D%5D)

[["35.2","1625.9"]]

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