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This lesson is a part of the course Hypothesis Testing
z-statistic is the computed value of the test statistic based on the standard normal distribution.
z-statistic with is calculated as follows:
In the hypothesis test, we compare the z-statistic with the critical z-value at a given level of significance and appropriate degrees of freedom.
Note that when the sample size is large, the population standard deviation (s) can be replaced with sample standard deviation (s).
