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SPSS Introduction - Advanced Permutations

10/28/2014

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Having introduced the concept of combinations and permutations in the last post I'd like to continue with this theme and touch on some more advanced concepts. As I said before, SPSS is fantastic and does a huge amount of statistical analysis work for you but you do need to understand the underlying statistical concepts well to get the most from it.

 Last time we talked about combinations and permutations with groups of different items, or more formally put sets of n items each of which was unique. This time I'm going to explore what happens if the groups we're working with aren't all different items. A classic example of this being phone numbers where a number can reoccur a number of times in some cases.

If you want to look at combinations where not all of the set are different then the formula that you use is

nC n1, n2


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    Written by the team at Acuity Training

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