Khan/khan-exercises — Issue #13951: Empirical rule - Needing to write a %
Author: KhanBugz
Created: 2012-02-16 04:56:03+00:00
State: open
Labels: chrome, hard, win7

To make missing the % an incorrect answer is just plain annoying. Further more it serves no long or short term benefit and in no way reflects on the persons understanding of the topic. This is especially so considering that a high % of the time it's just from being used to typing the answer and pressing enter, but by then it's already too late.

[empirical_rule.html?seed=97&problem=shorter](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/empirical_rule.html?seed=97&problem=shorter&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/empirical_rule.html?seed=97&problem=shorter&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.11 Safari/535.19

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