TI-84 Commands: 1-variable statistics, cumulative distribution functions

Calculators increase speed and accuracy. In this video, Dr T calculates mean and standard deviation the hard way and easy way, showing the calculator is the more efficient option. For normally distributed data, normalcdf/pdf operations quickly find probabilities of a datum being less than or greater than some number. Whereas z-scores and tables were needed, now the TI series calculators remove steps and improve reliability.