Solution 35294: Finding T Distribution Values on the TI-84 Family of Graphing Calculators.
How do I find T distribution values on the TI-84 family of graphing calculators?
tcdf( computes the Student t distribution probability between lowerbound and upperbound for the specified df (degrees of freedom), which must be > 0.Example: Find the area under a T curve with degrees of freedom 4 for P( 1 = X = 5 ).
1a) TI-84 Evo: Press [alpha] [DISTR] [2] [2] to select tcdf(
1b) TI-84 Plus CE and TI-84 Plus: Press [2nd] [DISTR] [6] to select tcdf(.
2) Input 1 for the the lower bound and press [ENTER].
3) Input 5 for the upper bound and press [ENTER].
4) Input 4 for the degrees of freedom and press [ENTER].
5a) TI-84 Evo: Press [window] or [zoom] to then [Enter] calculate
5b) TI-84 Plus CE and TI-84 Plus: Press [Enter] twice to calculate
The answer is .1832052662, or about 18.32%.
Please see the TI-84 Family guidebooks for additional information.