PSYC 2700 Lecture Notes - Lecture 8: Central Limit Theorem, Null Hypothesis, Standard Deviation

• School: Carleton University
• Department: Psychology
• Course: PSYC 2700
• Professor: Chris Herdman

Document Summary

For midterm 1 know how to find sigma x and sigma x^2. Difference between mean, median and mode; how to find each. Shape of distribution - know where the mean, median and mode (know for the positive and negative skewed as well) Sum of squared deviation scores (ss) - include formula. Sd formulas and know when to use when. Know why it is n-1 (include this) - only n-1 scores are free to vary, so we divide by n-1. When sd and mean changes for each and how it changes. Know what happens what happens if you add one score to one student and how to do the calculations. Know how to calculate sd for a sample (degree of freedom of n-1) Know how to use the unit normal table (where the body, tail and mean and z) How to find the raw scores from the z-score. Know what standard error tells you - difference between sample mean and population.