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user 9985
For questions about the practice or science of collecting and analysing numerical data in large quantities, for instance for the purpose of inferring proportions in a whole from those in a representative sample.
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votes
What is the point of teaching variance?
I'll work through a toy problem with both SD and Variance, and examine which is simpler.
Suppose you roll 100 fair six sided dice. Is it surprising if they sum up to 360?
Well, E(d6) = 3.5, E(100 d …
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