18th November 2019

statsdirect
15

What does P value of 0.001 mean?

The term significance level (alpha) is used to refer to a pre-chosen probability and the term "P value" is used to indicate a probability that you calculate after a given study. Conventionally the 5% (less than 1 in 20 chance of being wrong), 1% and 0.1% (P < 0.05, 0.01 and 0.001) levels have been used.

What is the significance level for Chi Square?

Significance level. Often, researchers choose significance levels equal to 0.01, 0.05, or 0.10; but any value between 0 and 1 can be used. Test method. Use the chi-square test for independence to determine whether there is a significant relationship between two categorical variables.
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