Statistics issue with NORMALD_CDF?

03232015, 08:19 PM
Post: #1




Statistics issue with NORMALD_CDF?
I'm trying to run normal cumulative distribution functions in "Home" mode.
First, this seems to work fine in CAS: normald_cdf(10, 0.2, 10.4) ==> 0.9772... But when I try this in Home mode, I get: 10 Enter 0.2 Enter 10.4 Enter NORMALD_CDF() ==> 1 which is wrong... However, the test case in help works fine: 0 ENTER 1 ENTER 2 ENTER NORMALD_CDF() ==> 0.9772... which gives the same as in the CAS test case above because they both correspond to 2 sigma... So am I doing something wrong in Home mode? Or is the mean value and standard deviation being treated as 0, 1 rather than 10, 0.2? Thanks Jonathan 

03232015, 08:33 PM
Post: #2




RE: Statistics issue with NORMALD_CDF?
(03232015 08:19 PM)Jonathan Cameron Wrote: I'm trying to run normal cumulative distribution functions in "Home" mode. hello Jonathan, also by in Home (with RPN) it' wrong, but it's ok in Algebric mode and TextBook, so I think there is something not correct concerning RPN... Salvo ∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C  DM42, DM41X  WP34s Prime Soft. Lib 

03232015, 08:43 PM
Post: #3




RE: Statistics issue with NORMALD_CDF?
(03232015 08:19 PM)Jonathan Cameron Wrote: But when I try this in Home mode, I get: I think you need to tell it how many arguments you take off the stack, so please try 10 Enter 0.2 Enter 10.4 Enter NORMALD_CDF(3) Cheers, Terje 

03242015, 12:37 AM
Post: #4




RE: Statistics issue with NORMALD_CDF?
(03232015 08:43 PM)Terje Vallestad Wrote:(03232015 08:19 PM)Jonathan Cameron Wrote: But when I try this in Home mode, I get: Thanks Terje! I did not know you had to tell it how many arguments to process. It makes sense that the number of arguments is necessary since 1, 3, and 4 arguments all are legal but mean different things. Jonathan 

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