2 Sample T Test Test Statistic. Looking up t tables using spreadsheet software such as excel s tinv function is easiest one finds that the critical value of t is 2 06. Choose stat basic statistics 2 sample t.
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The number of degrees of freedom for the problem is the smaller of n 1 1 and n 2 1. The resulting number is called as the mean or the average. In the two sample t test the t statistics are retrieved by subtracting the difference between the two sample means from the null hypothesis which is is zero.
A common application is to test if a new process or treatment is superior to a current process or treatment.
Test statistic in a two sample t test practice khan academy. Testing the difference between two means. There are several variations on this test. Test statistic in a two sample t test practice khan academy.
