The Museum of HP Calculators

HP Forum Archive 09

 Statistics on HP15CMessage #1 Posted by Alexandre KAMP on 12 Oct 2002, 5:06 p.m. Can anyone remind me how I can enter (xi,yi) datas on my HP15C and then find out the statitics results : - Sum(xi) - Sum(yi) - Sum (xi*yi) - and so on ...

 Re: Statistics on HP15CMessage #2 Posted by Tom Sherman (Maine) on 12 Oct 2002, 5:22 p.m.,in response to message #1 by Alexandre KAMP Entering statistical data on HP-15: y value (Enter) x value (SUM+) key to the left of + repeat as many times as you have data points Data are stored in the following registers: R2: n, # of data points R3: sum of x values R4: sum of x^2 R5: sum of y R6: sum of y^2 R7: sum of xy Recall data by pressing RCL key followed by number of register. Sorry about the bad formatting of this posting -- I don't know how to correct it.

 Improving your posts' view (was Statistics on HP15C)Message #3 Posted by Vieira, Luiz C. (Brazil) on 14 Oct 2002, 11:26 p.m.,in response to message #2 by Tom Sherman (Maine) Hi, Tom; if you have the time for it, read this here. If not, here is the tip: if you have a text you want to be seen exactly as you type it here, with all line-feeds and monotyped spaces, simply put a [pre] before its first character and a [/pre] after its last character. Your text would look like this: ```R2: n, # of data points R3: sum of x values R4: sum of x^2 R5: sum of y R6: sum of y^2 R7: sum of xy``` To accomplish this, you type: ```[pre]R2: n, # of data points R3: sum of x values R4: sum of x^2 R5: sum of y R6: sum of y^2 R7: sum of xy[/pre]``` Hope it helps.

 Re: Statistics on HP15CMessage #4 Posted by Stephan on 12 Oct 2002, 5:38 p.m.,in response to message #1 by Alexandre KAMP To clear stat registers press: f CLEAR Sigma To enter pairs (xi, yi) press: yi ENTER xi Sigma+ RCL 2: number of elements (pairs) RCL 3: sum(xi) RCL 4: sum (xi**2) RCL 5: sum (yi) RCL 6: sum (yi**2) RCL 7: sum(xi*yi) g x: average x x <--> y : average y Linear regression y = m * x + b f L.R. returns b x <--> y returns m

 Re: Statistics on HP15CMessage #5 Posted by thibaut.be on 13 Oct 2002, 2:51 a.m.,in response to message #4 by Stephan look at the back of your 15C : there is a summary of all stats registers.

 Re: Statistics on HP15CMessage #6 Posted by R Lion on 17 Oct 2002, 2:12 p.m.,in response to message #5 by thibaut.be Perhaps someone could be interested... I've some own programs for statistics for the 15C: Entering Data with frequencies (one or two variables) Confidence interval for mean and sample size Confidence interval for proportion and sample size Binomial distribution B(n,p) Normal standard distribution and inverse Normal s. distr. If you want, feel free for mailing me Raul

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