Z-Test is such a test statistic where we make use of the mean value and z score to determine the P-value. This random variable is used to calculate the P-value, which indicates how strong the evidence is against the null hypothesis. Z-Test as Hypothesis TestĪ test statistic is a random variable that we calculate from the sample data to determine whether to reject the null hypothesis.
We make use of the Z score and the Z table for running the Z-Test. This test is widely used to determine whether the mean of the two samples are different when the variance is known. Z-Test is a test statistic commonly used in hypothesis test when the sample data is large.For carrying out the Z-Test, population parameters such as mean, variance, and standard deviation should be known. Z-Test is a statistical test which let’s us approximate the distribution of the test statistic under the null hypothesis using normal distribution.
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