Timeline for Building a representive sample from a large data set
Current License: CC BY-SA 3.0
11 events
when toggle format | what | by | license | comment | |
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Aug 7, 2015 at 19:16 | answer | added | James | timeline score: 0 | |
Aug 7, 2015 at 16:23 | comment | added | Shamp0o | My tutor said not to get hung up on this problem and to just do simulations with a sample of small and big parcels respectively and one with a "representative" sample if I'm able to find one. Hence my original question. | |
Aug 7, 2015 at 16:23 | comment | added | Shamp0o | Thanks for you answer. I'm not sure I understand though. Just to clarify, the optimum shouldn't be found by adjusting parcel parameters. In reality I have no influence on those. But I don't think that's what your suggesting anyway. If I understand correctly you suggest I should look for a sample that makes it easiest to determine my optimal system parameters (which include conveyor speed and geometry settings). | |
Aug 7, 2015 at 15:37 | comment | added | whuber♦ | Thank you for the edit (+1). This adds considerable information to the question, because it indicates you are in an experimental design situation and that you are seeking to estimate a response surface in order to optimize a response. That suggests you might not want a statistically representative sample--instead, you need one that will give you the best possible estimate of the optimum. If you know nothing about the response, you might want your sample to exhibit a variety of extreme characteristics, whereas if you know about where the optimum is, you want the sample to be near it. | |
Aug 7, 2015 at 14:47 | comment | added | Shamp0o | A friend also just suggested clustering to me. I'm not familiar with cluster analysis so I guess I'll have some reading up to do. I edited my question to give some information about the simulation. I hope this helps. | |
Aug 7, 2015 at 14:45 | history | edited | Shamp0o | CC BY-SA 3.0 |
information about the simulation
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Aug 7, 2015 at 14:00 | comment | added | gung - Reinstate Monica | If you are randomly sampling, the data should be representative (in the ordinary sense of the word), nor could there be any true outliers. | |
Aug 7, 2015 at 13:52 | comment | added | whuber♦ | The practical meaning of "representative" in this instance will have to depend on what you are simulating and the purpose of that simulation. Could you tell us a little about those? | |
Aug 7, 2015 at 13:51 | comment | added | John Madden | Have you considered clustering? | |
Aug 7, 2015 at 13:49 | review | First posts | |||
Aug 7, 2015 at 14:01 | |||||
Aug 7, 2015 at 13:45 | history | asked | Shamp0o | CC BY-SA 3.0 |