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Calculus

- An intuitive explanation of epsilon delta proofs
- First year calculus students often struggle with the level of formalism involved and don't have a good intuitive understanding. It's also inevitably on the first midterm. This page first explains some of the intuitive reasoning, and then gives some examples of proofs.

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Probability and Statistics

- The base rate fallacy
- When a medical test comes back positive, how likely are you to have the disease? If it's rare, it's probably less likely than you think, even for a very accurate test.