Tools

T-Test

Calculator

  Sample 1 Sample 2
Mean
Standard deviation  
Sample size  
Alpha  
Tail / side

Result


Fill in the fields in the calculator box and press 'Calculate' for the statistical significance.

Calculator

  Sample 1 Sample 2
Mean
Standard deviation
Sample size
Alpha  
Variance
Tail / side

Result


Fill in the fields in the calculator box and press 'Calculate' for the statistical significance.

Calculator

t-score t-score to p-value
degrees of freedom  
p-value p-value to t-score
Tail / side

Result


Fill in the fields in the calculator box and press 'Calculate' for the statistical significance.


Information

Student's t-test is a significance test for assessing hypotheses about populations means. In-Silico Online offers two different t-tests:

A one-sample or single sample t-test is used to test whether the mean of a population takes a particular value. Additionally, the one-sample sample t-test can be used for paired or repeated measurements, for example blood pressure measures before and after intensive activity. Important is that the sample sizes and the variance between the measurements are equal (average standard deviation should be used here).

The two-samples or independent samples t-test is designed to test the equality of the means of two populations. Sample sizes and variances may but do not have to be equal.

The t-score to p-value transformation is being done by Student's T cumulative distribution function.