Timeline for Determining statistical significance of quintile means
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| May 27, 2016 at 15:40 | history | tweeted | twitter.com/StackStats/status/736220512414752769 | ||
| May 18, 2016 at 16:49 | history | edited | Nick Cox | CC BY-SA 3.0 |
edited title
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| May 18, 2016 at 16:49 | comment | added | Nick Cox | Thanks for the extra detail. If I were a consultant, I would still advise looking at the relationship between your variables both treated as essentially continuous. I've edited the title to quintile from quartile which seems uncontentious. | |
| May 18, 2016 at 16:45 | history | edited | pheeper | CC BY-SA 3.0 |
added 440 characters in body
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| May 18, 2016 at 16:43 | comment | added | pheeper | I appreciate and understand your feedback. I should have given more background information upfront (see update above). | |
| May 18, 2016 at 16:16 | comment | added | Nick Cox | I don't have good news for you: that sounds artificial, indirect and highly problematic. You'd find it hard to distinguish side-effects of the way you approach the problem from genuine differences. More simply put, why "segment the universe" at all? If there are pre-defined categories, that's fine; otherwise not. | |
| May 18, 2016 at 15:47 | answer | added | ShainaR | timeline score: 0 | |
| May 18, 2016 at 15:42 | comment | added | pheeper | I want to segment the physician universe based on the number of HIV patients diagnose annually and then look to see if there are any specific variables which are significantly different in one segment vs the others. | |
| May 18, 2016 at 15:14 | comment | added | Nick Cox | This seems at best an indirect and awkward way to approach the question of how two variables are related. You have two variables, so plot them and then think about their relationship. If you show us the data, or at least a graph, we might be able to suggest a model. In contrast, division into quintile bins is arbitrary and loses information. What is that you are comparing, the means of # patients diagnosed for different bins of years in practice? There is also a problem of multiple comparison if you are thinking of 10 possible t tests, or even if you are not. | |
| May 18, 2016 at 15:13 | review | First posts | |||
| May 18, 2016 at 15:33 | |||||
| May 18, 2016 at 15:03 | history | asked | pheeper | CC BY-SA 3.0 |