SSCI 2910U Lecture Notes - Lecture 2: Interval Ratio, Frequency Distribution, Interquartile Range
12 Feb 2018
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Week 2- basic descriptive statistics: percentages, ratios and rates, tables, Proportion (p) n: f = frequency, n = sample size. Total of females who are social science majors: f = 246. Proportion = decimal (reported by 2 decimal points) Ratios = compares the relative sizes of categories; that is part to part: ratio = f1/f2, f1 = number of cases in first category, f2 = number of cases in second category. Example of ratios: in a classroom of 42 students, there are 23 females and 19 males, the ratio of males to females is: 19/23 = 0. 83, for every female there are 0. 83 males. Rates: the number of actual occurrences of an event divided by the number of possible occurrences, per some unit of time. Frequency distributions univariate: summarize distribution of a variable by reporting the number of times each score of a variable occurred, general rule for categories of frequency distribution:
