T test: The t-test formula is used

The t-test formula is used to compare the mean of two groups of samples and determine if they belong to the same population. Understand the t-test Formula with Derivation, Examples, and FAQs. T-test Calculators The t-test is not one test , but a group of tests that constitutes all statistical tests distribute as t -distribution (Student’s t -distribution). We use the t-test (s) to compare the sample average (Mean) to the known mean or to compare the averages of two groups when we don’ t know the standard deviation, and use the sample standard deviation. When we know the standard deviation value, for example from another research, we use the z- test , but usually, we have only the ... T-Test is a method used in statistics to determine if there is a significant difference between the means of two groups and how they are related. In T-Test statistics, the sample data is a subset of the two groups that we use to draw conclusions about the groups as a whole. T-Test in Statistics For example, if we want to know the average weight of mangoes grown on a farm, the population would consist of all the mangoes that grew on the farm. However, it would be time-consuming to weigh each ...