# SU-CS109 Midterm

- standard normal density function, and formula for phi for ARBITURARY normals (x-u/sigma)
- practice using
**inverse phi**

- BEWARE that sigma is not sigma squared
- PDF AND CDF, Mean, Var, params, Generative Story for:
- continuity correction
- permutation and combinations formula
- counting formulas: binning, stars and bars, and the counting methods tree from beginning of class
- probability theorems: law of total probabaly, baysian, demorgans, counting with and and or
- multinomial distribution
- binomial coefficient (i.e. combinations formula), multinomial coefficient
- joint probability distribution and their table
- Naive Bayes divison ratio trick
- relative probability