PSYC 21621 Lecture 2: Lecture 2: PEMSDAS/Summation

• School: Kent State University
• Department: Psychology
• Course: PSYC 21621
• Professor: Jaruda

Document Summary

The summation symbol : many statistical procedures involve finding the sum of a set of scores/samples, the sign (sigma) stands for summation. It is followed by a symbol or equation that defines what is to be added up: summation is done after operations in parenthesis, exponents (squaring) and multiplication or subtraction. Order of operations: parentheses: do whatever operations are inside the parentheses, exponent: find the square, cube, or whatever exponent is indicated, multiply/divide: multiplication and/or division, summation: add up whatever follows, add/subtract: any other addition and/or subtraction.