A test on the mean of a normal variate when the variance is unknown.

In Praat, the t-test is used to query a Covariance object and:

1. get the significance of one mean. See Covariance: Get significance of one mean....

2. get the significance of the difference between two means. See Covariance: Get significance of means difference....

You should use a t-test when you want to test a hypothesis about the mean of one column in a TableOfReal object, or, if you want to test a hypothesis about the difference between the means of two columns in this object.

You can perform these t-tests in Praat by first transforming the TableOfReal object into a Covariance object (see TableOfReal: To Covariance) and then choosing the appropriate query method on the latter object.

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