Scroll to option 2 (or just press “2”) for “normalcdf.”.
On both the TI 84 and TI 83, NormCDF is in the same place: If a random variable is normally distributed, you can use the normalcdf command to find the probability that the variable will fall into a certain interval that you supply. Normalcdf is the normal (Gaussian) cumulative distribution function on the TI 83/TI 84 calculator. The TI 83 and TI 84 graphing calculators can help you figure out normal distribution probabilities with the normalcdf function. TI 83 > TI 83 NormalCDF TI 83 NormalCDF / TI 84: Overview
