Sociology 2205A/B Lecture Notes - Lecture 3: Interquartile Range, Model Category, Central Tendency

• School: Western University
• Department: Sociology
• Course: Sociology 2205A/B
• Professor: Stephen Lin

Document Summary

Overview slide 1: measures of central tendency, capture the center, typical, average values, most common: mean (for continuous/interval-ratio) In some cases: median, for skewed variables: largely used for categorical variables: mode, measures of dispersion, capture the variability, or dispersion, around the center, most common: standard deviation/variance, also used: range, interquartile range. The proportion not in the mode is thus 1-0. 71, or 0. 29. Professor stephen lin: summarize the variable below in a similar manner, the modal category is 2 children, with 51. 7% of respondents. Measures of center: mean: mean: the average score (the arithmetic average, most common measure of center for continuous variables, sample mean symbol x , calculate as, where n=sample size, and each one value. Professor stephen lin: highest daily temperature recorded in london ontario in mid-january 2018 over five days, calculate the mean temperature, report in one sentence. 5: the mean temperature was 3 degrees.