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Okay this one is a bit tricky. I have read several of the posts on random
number generation, but still can't quite put this one into perspective. In column K I have a variable number of records anywhere from 1 to X. It will change each time I run the function. The records are grouped by a prefix 1-6 (ie. 6-2034, 2-3905). The thing is that I need a random sampling of 30 of those records to be pasted into column A. Then it only gets trickier. Each prefix must be represented in column A dependent upon how much it shows up in column K with at least one of each prefix being copied if it exists in K. For example lets say that there are 100 records in K: 59 of them have the 1 prefix, 25 of them have the 2 prefix, 10 of them have the 3 prefix, 5 of them have the 4 prefix, 1 of them has the 5 prefix and 0 of them have the 6 prefix. In the 30 record sample I would need the following sampling: Prefix--Sample 6--0 5--1 4--2 3--3 2--8 1--16 I actually have a little summary box on the sheet that tells me how many samples that I need using the following formula: =IF(B7=1, 1, PRODUCT(B7/B13*30)) B7 being the number of times that prefix shows up in column K and B13 the total of all prefixes in column K. Prefix 1 is always the most prevelant and so its formula is simply 30 - the total sampling of all other prefixes (I have to do this in order to keep the sample at 30). So basically, in this sample I would need to randomly choose 16 numbers in the K column that have the 1 prefix and paste them to a table I have in column A, 8 random ones for 2 prefix and so on. Obviously for prefix 5 the one number in column K that has the 5 prefix would be copied. The range of the numbers in column K are K3-Kx The range where the random numbers will be pasted in column A are A17-A46 I hope this makes sense. It's hard to explain without being able to show the worksheet. Thanks in advance for any help |
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