Timeline for Does there exist a process to build a list of numbers whose standard deviation is an integer?
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 8, 2020 at 15:32 | history | edited | Iosif Pinelis | CC BY-SA 4.0 |
added 149 characters in body
|
| Nov 8, 2020 at 14:40 | history | edited | Iosif Pinelis | CC BY-SA 4.0 |
added 2647 characters in body
|
| Nov 8, 2020 at 4:50 | history | edited | Iosif Pinelis | CC BY-SA 4.0 |
added 11 characters in body
|
| Nov 8, 2020 at 1:22 | history | edited | Iosif Pinelis | CC BY-SA 4.0 |
added 482 characters in body
|
| Nov 8, 2020 at 1:00 | comment | added | Iosif Pinelis | @GerryMyerson : Thank you for your comment. I have now tried to address it. | |
| Nov 8, 2020 at 0:56 | history | edited | Iosif Pinelis | CC BY-SA 4.0 |
added 637 characters in body
|
| Nov 7, 2020 at 8:51 | comment | added | John Bentin | @GerryMyerson : At the end of the second line in your comment, should the numerator of the fraction be 1273 rather than 1003 ? Anyway, it's still not an integer. | |
| Nov 6, 2020 at 23:09 | comment | added | Gerry Myerson | Modulo arithmetical errors, the sequence $4,0,8,6,10,0,4,2,5,0,8,5,0,0,0$ has $n=15$, $A=\Sigma x_i=52$, $B=\Sigma x_i^2=350$ and sample variance $(1/14)(B-(1/15)A^2)=1003/105$ (or, using a different formula, $(1/15)(B-(1/15)A^2)=2546/225$), not an integer. | |
| Nov 6, 2020 at 22:18 | history | edited | Iosif Pinelis | CC BY-SA 4.0 |
added 288 characters in body
|
| Nov 6, 2020 at 22:03 | history | edited | Iosif Pinelis | CC BY-SA 4.0 |
added 8 characters in body
|
| Nov 6, 2020 at 19:20 | history | edited | Iosif Pinelis | CC BY-SA 4.0 |
added 223 characters in body
|
| Nov 6, 2020 at 19:08 | history | edited | Iosif Pinelis | CC BY-SA 4.0 |
added 12 characters in body
|
| Nov 6, 2020 at 19:01 | history | answered | Iosif Pinelis | CC BY-SA 4.0 |