POLSCI 391 Study Guide - Midterm Guide: Six Sigma, Thomas Piketty, Compartmental Models In Epidemiology
Document Summary
Variation acorss time (data may be different within next period because people change preferences) and across space never consistent, and some countries don"t record data for social sciences if not in their best interests (authoritarian) Difference between bond and site percolation and why do we care. Site: forest fire, each tree is different site. Bond: direct flow through bonds, water going down roots. Four beginning y will stay consistent with x, then something happens where correlation changes not necessarily a tip because could be part of patter. Two categories of reasons why we model vs. the five reasons. One to many: how does one person affect. Many to one: cultural model and how culture affects individual. The last 2 sigmas the variation is so little that you could stop at the four sigmas. R0 = pdiffuse / precover >1 means numerator is smaller than denominator meaning more probability of recovering.
