Other Methods for
Testing a Hypothesis

The Hypothesis test for the Mean conducted in the previous lesson is what is commonly referred to as a z-test, which simply means a test utilizing the z-values of the Standard Distribution.  As you know, to utilize this procedure it is necessary for one to have not only the population sample data, but the standard deviation of the population, a variable that when unavailable can be replaced with the standard deviation of the sample population S if n >30.  

Oftentimes statisticians are bereft of the required information to conduct a z-test. But there are alternative testing methods when the data describing a population is left incomplete.


Test of Variances

Test of Proportions

Review of Testing Procedures