P-value in statistics

label Statistics
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How do we calculate the p-value for the left tail test?

Oct 20th, 2017

The p-value is the area to the right or left of the test statistic. If it is a two tail test, then look up the probability in one tail and double it.

If the test statistic is in the critical region, then the p-value will be less than the level of significance. It does not matter whether it is a left tail, right tail, or two tail test. This rule always holds.


May 5th, 2015

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Oct 20th, 2017
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Oct 21st, 2017
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