Timeline for Combining two means and SDs of one group [duplicate]
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 30, 2018 at 16:30 | history | closed | whuber♦ | Duplicate of Combining two covariance matrices | |
| Dec 30, 2018 at 9:21 | answer | added | Ben | timeline score: 2 | |
| Dec 30, 2018 at 6:37 | vote | accept | Mohamed Gomaa Kamel | ||
| Dec 30, 2018 at 6:37 | |||||
| Dec 30, 2018 at 6:35 | comment | added | user158565 | $(N_1\bar X_1 + N_2\bar X_2 +...+N_k\bar X_k )/(N_1 + N_2+...,+N_k)$ | |
| Dec 30, 2018 at 6:27 | answer | added | eSurfsnake | timeline score: 0 | |
| Dec 30, 2018 at 6:08 | comment | added | Mohamed Gomaa Kamel | Thanks for your answer What is the formula? | |
| Dec 30, 2018 at 5:46 | comment | added | user158565 | You can combine means given you have sample size n if you think it is meaningful. | |
| Dec 30, 2018 at 5:44 | comment | added | Mohamed Gomaa Kamel | And what about the mean? | |
| Dec 30, 2018 at 5:23 | comment | added | user158565 | The covariance or correlation coefficient is needed for combining the SDs. | |
| S Dec 30, 2018 at 5:03 | history | edited | Mohamed Gomaa Kamel | CC BY-SA 4.0 |
improved text.
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| S Dec 30, 2018 at 5:03 | history | suggested | Angel | CC BY-SA 4.0 |
improved text.
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| Dec 30, 2018 at 4:57 | review | Suggested edits | |||
| S Dec 30, 2018 at 5:03 | |||||
| Dec 30, 2018 at 4:55 | review | First posts | |||
| Dec 30, 2018 at 5:23 | |||||
| Dec 30, 2018 at 4:54 | history | asked | Mohamed Gomaa Kamel | CC BY-SA 4.0 |