2 Sample T Test Test Statistic. It is calculated by adding all the data in a population and then dividing the total by the number of points. Open the sample data hospitalcomparison mtw.
The two sided test is what we want prob t. Example of hypotheses for paired and two sample t tests. There are several variations on this test.
Where and are the means of the two samples δ is the hypothesized difference between the population means 0 if testing for equal means s 1 and s 2 are the standard deviations of the two samples and n 1 and n 2 are the sizes of the two samples.
The software shows results for a two sided test and for one sided tests. Hypotheses for a two sample t test. The test statistic is 2 79996. Where and are the means of the two samples δ is the hypothesized difference between the population means 0 if testing for equal means s 1 and s 2 are the standard deviations of the two samples and n 1 and n 2 are the sizes of the two samples.
