On your TI-84 normalcdf(65,67,68.5,1.7) 0.169037441 About 16.9% -------------------------------- To get normalcdf, press 2nd, VARS, 2 If you see this, make it read: lower:65 upper:67 μ:68.5 σ:1.7 Paste Scroll to highlight "Paste", then press enter Edwin