sigma x squared y on wp34s

01212016, 05:59 PM
Post: #1




sigma x squared y on wp34s
Can anyone tell me what statistical analysis uses sigma x squared y?
Many thanks! Hank 

01212016, 06:32 PM
Post: #2




RE: sigma x squared y on wp34s
You find it in the WP 34S Owner's Manual, App. I, Chapter "More Statistical Formulas", in the expression for the sample standard deviation for weighted data (where the weight yi of each data point xi is entered via Σ+ ).
d:) 

01212016, 06:56 PM
Post: #3




RE: sigma x squared y on wp34s
Thank you so much, Walter, for your quick response. I was thinking in terms of bivariate data, not weights.
I want you to know what a pleasure it is to use the 42s. It brings back the excitement of the 41CV from way back in the day. You must be very proud! Best, Hank 

01212016, 07:00 PM
Post: #4




RE: sigma x squared y on wp34s
I meant the 34s


01242016, 03:12 PM
Post: #5




RE: sigma x squared y on wp34s
Thank you for your very kind words. I must admit I think all three of us  Pauli, Marcus, and me  are sometimes a little bit proud. And also Sanjeev and Bob can be proud of the WP 31S.
And since pride is like icecream  once you have tasted a little bit you want more  we'd like to see something like a WP 35S / DM 35L (see here) or even a WP 43S (see here*) materializing. Maybe ... d:) *Alas, that most popular thread of the entire forum was closed by our favorite SM since he obviously dislikes impatient little guinea pigs. Waiting for food for years now, they are nevertheless condemned to stay calm  no complaints about late people. 

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