How to Calculate T-Distribution From a TI-84 Calculator

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Student's t-distribution is a probability distribution for estimating the mean of a normally distributed population when the sample population is small. The distribution is used for many types of statistical studies, but primarily in linear regression analysis and for the Student t-tests in assessing difference between two sample means. Given the often complex equations which govern such functions Texas Instruments has a line of graphing calculators with these functions pre-programmed for easy use. T-distribution is one of several distribution models available on the TI-84.

Things You'll Need

  • TI-84 graphing calculator
  • Turn the calculator on with the "ON" button, the bottom button on the left side.

  • Press the "2nd" button, the blue button located on the top left of the calculator.

  • Press the "VARS" button, located second from the right and directly below the direction buttons near the top. This brings up the "DISTR" function.

  • Scroll down to and select the fifth option "tcdf" (t cumulative probably distribution function).

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