Khan/khan-exercises — Issue #12170: Standard deviation - Standard Deviation Module
Author: KhanBugz
Created: 2012-01-26 12:51:25+00:00
State: open
Labels: hard, ipad

Reporter: rob@dagazgroup.com

This module involves a lot of computations. The profiency bar is more of a measure of my accuracy than my grasp of the concept. Changing the samples so that their average was a whole number would greatly simplify the problem and would reduce the errors by about half.

Thanks!

[standard_deviation.html?seed=11&problem=sample](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/standard_deviation.html?seed=11&problem=sample&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/standard_deviation.html?seed=11&problem=sample&debug&activity=%5B%5B%22correct-activity%22%2C%22%5B%5C%2210.6%5C%22%2C%5C%225.9%5C%22%5D%22%2C267%5D%5D)

[["10.6","5.9"]]

Mozilla/5.0 (iPad; CPU OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334

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