How can I calculate a t critical value using a TI-84?

Answer 1

Here is a link to a page that describes finding a t critical value using a TI-84 calulator.

https://cpb-us-e1.wpmucdn.com/sites.pc.gsu.edu/dist/8/175/files/2015/07/invT-29o6ua9.pdf

You'll need to know two things in order to find the t-critical value using your calculator, "the area to the left" and the degrees of freedom.

1. The "area to the left" is 1 minus the level of significance for a one tailed test and (1 minus level of significance)/2 for a two tailed test.
2. The degrees of freedom is sample size minus one.

Hope this helps.