Implementations-of-Probability-Theory/notes.md

Assumptions and Learnings

• probability density function expected value
• Confidence interval is not my value * confidence, it's confidence chance of being in my range
• I've made some mistakes in stat review, looking at narrow topics before covering broader parent topics. Should reorganize structure (tree, not list?)

t-test, z-test: both are hypothesis tests The t-test is used when the population variance is unknown, or the sample size is small (n < 30) The z-test is used when the population variance (σ2) is known and the sample size is large (n > 30) To create a z-distribution table, mathematicians calculate the CDF for various z-scores and tabulate the results.