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How to perform f tests, t tests, and z tests?


Asked by Meredith Russo on Nov 29, 2021 FAQ



How to perform F-tests, t-Tests, and z-Tests using the Analysis ToolPak Excel 2016. The Analysis ToolPak is an Excel add-in program that provides data analysis tools for financial, statistical and engineering data analysis.
Additionally,
The T-test is applied when the sample population is less than 30 and the standard deviation is unknown, whereas the f-test can be applied upon the large sampled population. The T-test is used to check the hypothesis for the sample mean whereas the f-test is used to run the hypothesis on the variance of the samples.
Keeping this in consideration, We perform a One-Sample t-test when we want to compare a sample mean with the population mean. The difference from the Z Test is that we do not have the information on Population Variance here. We use the sample standard deviation instead of population standard deviation in this case.
Next,
Example: Comparing the fraction defectives from 2 production lines. A t-test is used for testing the mean of one population against a standard or comparing the means of two populations if you do not know the populations’ standard deviation and when you have a limited sample (n < 30).
Also Know,
The paired t-test is used to determine paired differences. It is used in the cases where the sample is less than 50 and the sample on which the test was priory applied remains the same. The One-sample t-test is used to compare a sample mean to a specific value.