2 Sample T Test Formula. μ1 μ2 the two population means are not equal. 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.
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Mean of the first sample. Sample standard deviation as calculated for the test statistic. Mean of the second sample.
Inverse cumulative probability of a t distribution at 1 α 2.
Mean of the first sample. We will perform the two sample t test with the following hypotheses. Mean of the first sample. 1 confidence level 100.
