P value

P value is the probability that an observed difference occurring by chance if the null hypothesis is true.  The convention is to accept an observed difference as “real” if the likelihood that it due to chance is less than 1 in 20 (P<0.05).  A p value of less than 0.05 is said to be ‘statistically significant’.

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2018-03-21T09:05:02+00:00