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T-test

Requires that the samples are normally distributed. Select the type of test depending on if the samples are independent or paired, and if sample variances are equal or not.
 
Tests the hypotheses:
H0 There is no difference between the means of the samples  
H1 (two-tailed) The mean of sample A is different than the mean of sample B  
H1 (one-tailed) The mean of sample A is either less than or greater than the mean of sample B  

 Test Type


 Independent, equal variances
 Independent, unequal variances
 Paired

 Test Hypothesis


   The mean of sample A is different than the mean of sample B (two-tailed)
 <  The mean of sample A is less than the mean of sample B (one-tailed)
 >  The mean of sample A is greater than the mean of sample B (one-tailed)

 Data Entry


Sample A:
Sample B:
Significance level α: 
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