Khan/khan-exercises — Issue #15183: Variance - The video for variance is wrong.
Author: KhanBugz
Created: 2012-03-01 19:51:16+00:00
State: open
Labels: chrome, other, vista

Reporter: fmmmlee@gmail.com

The video for variance got the formula with all those numbers divided by the sample. I got my first question wrong on Variance because the video instructions are wrong. Please help!

[variance.html?seed=1&problem=sample](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/variance.html?seed=1&problem=sample&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/variance.html?seed=1&problem=sample&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%2268%5C%22%2C%5C%221196.5%5C%22%5D%22%2C169%5D%2C%5B%22hint-activity%22%2C%220%22%2C1%5D%2C%5B%22hint-activity%22%2C%220%22%2C1%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%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%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%5D)

[["68","1196.5"]]

Mozilla/5.0 (Windows NT 6.0) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11

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