Link to us

If you think that our site could be of use to your website's visitors you can link to our site

Advertise Here

If you are interested in advertising on, please follow the link below

     T-Distribution Probability Calculator

Compute t-distribution probabilities using the form below. Please type the number of degrees of freedom associated to the t-distribution, and provide details about the event you want to compute the probability for:

Number of Degrees of Freedom (df) =   

Two-Tailed:    ≤ T ≤

Left-Tailed:    T ≤

Right-Tailed:    T ≥

More about the t distribution probability: The t-distribution is a type of continuous probability distribution that takes random values on the whole real line. The main properties of the t-distribution are:

  • It is continuous (and as a consequence, the probability of getting any single, specific outcome is zero)

  • It is "bell shaped", in the same way the normal curves are bell-shaped

  • It is determined by one parameter: the number of degrees of freedom (df). For one sample, the number of degrees of freedom is df = n - 1, where n is the sample size

  • It is symmetric with respect to 0

  • The t-distribution "converges" to the standard normal distribution as the number of degrees of freedom (df) converges to infinity (+∞)

In order to compute probabilities associated to the t-distribution we can either use specialized software such as Excel, etc, or we can use t-distribution tables (normally available at college statistics textbooks. The use of the t-distribution arises when performing hypothesis testing (for the case when the population standard deviation is not known).

Get solved Math Problems, Math Cracks, Tips and Tutorials delivered weekly to your inbox

* indicates required

In case you have any suggestion, please do not hesitate to contact us.