To start with the conclusion, there are situations where low variance is advantageous, but the explanation that 'low variance ...
A guided discovery activity to help students prove the formulas. Note that the IB subject guide states that formal proof of mean and variance is not part of the syllabus. I did this in my class anyway ...
A set of 8 cards featuring a puzzle involving knowledge of the binomial distribution including using the cumulative tables and calculating variance and standard deviation. A great card sort puzzle, ...
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