T-Test? Z-Test? Chi Square? What are those? Well, these are all inferential statistical tools. T-test is used to determine the significant difference between two means of independent samples that is less than 30. Z-test is used to determine the significant difference between the sample mean and the perceived population mean. The variables are more than 30. Chi square is an inferential statistical tool which determines the observed and expected frequencies of independent variables.
In applying these tools, we used both the manual computation and the use of MS Excel. This made the learning more meaningful for we were able to compare the results from both methods.
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