HP Prime - Statistics

[David Hayden]

(08-22-2014 01:19 PM)paul.hermans@benemtech.com Wrote:  I could do normald_cdf(mean, std dev, upper_value) - normald_cdf(mean, std dev, lower_value) but that takes forever to enter.

Note that the first 2 arguments are optional and default to 0 and 1 respectively, so the formula you're looking for is normald_cdf(upper_value) - normald_cdf(lower_value).

You can enter the function by navigating from the toolbox key. I don't have my Prime with me right now, but I think after pressing the toolbox, it's "Probability" then "Cumulative" then "Normal".

Another possibility is to assign "normald_cdf" to a key and use the user keyboard.

Dave