## ← Two-Tailed Critical Values 001 - Intro to Inferential Statistics

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Showing Revision 6 created 05/25/2016 by Udacity Robot.

1. So if we bring up our handy-dandy z-table, we're looking for 0.005, because
2. 0.005 times 2 is 0.01. So here's 0.0051 and 0.0049, so z-critical value is
3. negative 2.57, or negative 2.58. It doesn't really matter too much, we'll just
4. say it's about negative 2.57. So if a proportion of 0.005 is less than negative
5. 2.57, a proportion of positive 0.005 is greater than positive 2.57. So our z
6. critical values are negative 2.57 and positive 2.57 and we can just shorten
7. this to plus or minus 2.57.