Sociology 2205A/B Lecture 1: Midterm 1 Notes

• School: Western University
• Department: Sociology
• Course: Sociology 2205A/B
• Professor: William Marshall

Document Summary

Commonly used symbols (consider putting on cheat sheet: (summation symbol) = add together all cases following this symbol, = variable name substitutes for the numbers. 2 means square each x and then add together. ( i)2 means find the sum of 1 + 2 + 3 and then square the total. Add all the values of x first and then you squared. Order of operations: (on cheat sheet: this refers to the order in which calculations in an equation should occur . b-e-d-m-a-s. = addition and subtraction are done last, in: b, e = exponents (i. e. squares or square roots next, d. = division and multiplication are done next, in: m the order that they appear in the equation, a, s the order that they appear, examples for bedmas, 6 + 2. If answer has a lot of decimal or if you so 01e-3 it means you move decimal 3 spaces to the left (. 0001).