Khan/khan-exercises — Issue #13679: Empirical rule - Unrounded answers are also correct
Author: KhanBugz
Created: 2012-02-12 17:41:56+00:00
State: open
Labels: firefox, wrong-or-unclear, xp

Reporter: verarium@gmail.com

The probability of being between +1 and +2 standard deviations is actually closer to 13.6% than 13.5%, and I think a range from the rounded to the actual answer should be considered correct.

[empirical_rule.html?seed=126&problem=between](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/empirical_rule.html?seed=126&problem=between&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/empirical_rule.html?seed=126&problem=between&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2213.6%25%5C%22%22%2C130%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%2C%5B%22hint-activity%22%2C%220%22%2C7%5D%2C%5B%22hint-activity%22%2C%220%22%2C7%5D%2C%5B%22hint-activity%22%2C%220%22%2C8%5D%2C%5B%22hint-activity%22%2C%220%22%2C10%5D%5D)

["13.6%"]

Mozilla/5.0 (Windows NT 5.1; rv:9.0.1) Gecko/20100101 Firefox/9.0.1

MathJax is loaded, ready, queue length: 0