SOCY 211 Lecture Notes - Lecture 2: Squared Deviations From The Mean, Standard Deviation

• School: Queen's University
• Department: Social Sci, Edu and Soc Work - Sociology
• Course: SOCY 211
• Professor: Carl Keane

Document Summary

Test number 1 is next week, january 26th- 40 multiple choice, bring pencil and eraser, no calculators. No class on tuesday unless you want to attend the tutorials- make sure you email questions to your specific ta if you want to attend. Skew to the left/right, positive or negative, is influenced by outliers. Range- the difference between the highest and the lowest score in a distribution. Range can easily be influenced by any outliers because you only use the highest and lowest scores. Standard deviation scores that are below the mean are negative, and above the mean are positive. Square ( all deviations so that all the numbers are positive rather than some positive, some negative. Do this for all the deviations this means the sum. Then you add up all the scores : the sum of square deviations from the mean. This is the formula that gives you the variance *the book shows it as n-1.