- Press 2nd VARS to get to the DISTR menu.
- Press the down arrow key to highlight normalcdf, and press ENTER.
- Input the leftmost z-score next to “lower.”
- Input the rightmost z-score next to “upper.”
- Input 0 next to μ.
- Input 1 next to σ.
- Highlight Paste and press ENTER twice. The calculator should display the area under the normal curve between the two specified endpoints (remember: use -100 for an infinite left endpoint, and 100 for an infinite right endpoint).