HP 50g — import statistical data into hypothesis test

[cdmackay]

(12-05-2018 06:15 AM)Carsen Wrote:  The values do not have to be written down on a piece of paper. If they are on the stack, you can use the HIST key to access the stack. Press HIST when you are in the T-Test environment, move the pointer to the value you want, press the soft menu ECHO, and then press ENTER.

thanks Carsen; it doesn't seem quite that simple, at least in the two-sample case that I'm considering.

If I use a 2-column arrangement in ΣDAT and the forms-based STAT (RS-5), I can select the column corresponding to the sample I want and request mean and sdev, and what gets put on the stack is a tagged object, e.g:

Code:

Mean:3
Std Dev:1.58

so when I then try to use HIST/ECHO to enter it into the hypothesis form, I have to muck about removing the text tag prefix. Or I could use DTAG before going into the stats form. Or, as you say, store it in a variable which would remove the tag. But I have to do each line separately.

If I instead use the soft-menu stats from the 96 MENU, it can handle both columns at once, and I get the results as an array on the stack:

Code:

[3. 4.]
[1.58 1.58]

which might be slightly easier to access from the hypothesis form, once it's in a var. It's also slightly easier to store, since it's easier to do mean and sdev separately, with the soft-menu keys, instead of having to go into the forms menu twice (for each column) with the RS-5 STAT.

I think I am spoiled by the import feature on the Prime's Inference app

thanks again for the suggestions.