Khan/khan-exercises — Issue #12257: Standard deviation - Variance Wrong
Author: KhanBugz
Created: 2012-01-27 04:11:19+00:00
State: open
Labels: leopard, safari, wrong-or-unclear

Reporter: jake.c.dailey@gmail.com

The variance is wrong (again), thus making the solution for standard deviation wrong. The deviations should be divided by 5 instead of 6.

[standard_deviation.html?seed=132&problem=population](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/standard_deviation.html?seed=132&problem=population&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/standard_deviation.html?seed=132&problem=population&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%2214.5%5C%22%2C%5C%228.1%5C%22%5D%22%2C60%5D%2C%5B%22hint-activity%22%2C%220%22%2C11%5D%2C%5B%22hint-activity%22%2C%220%22%2C12%5D%2C%5B%22hint-activity%22%2C%220%22%2C13%5D%2C%5B%22hint-activity%22%2C%220%22%2C13%5D%2C%5B%22hint-activity%22%2C%220%22%2C14%5D%2C%5B%22hint-activity%22%2C%220%22%2C17%5D%2C%5B%22hint-activity%22%2C%220%22%2C17%5D%2C%5B%22hint-activity%22%2C%220%22%2C20%5D%2C%5B%22hint-activity%22%2C%220%22%2C20%5D%2C%5B%22hint-activity%22%2C%220%22%2C22%5D%5D)

[["14.5","8.1"]]

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_5_8) AppleWebKit/534.50.2 (KHTML, like Gecko) Version/5.0.6 Safari/533.22.3

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