CRJS 2015 Lecture Notes - Lecture 11: Histogram, Interquartile Range, Central Tendency

• School: Mount Royal University
• Department: Criminal Justice
• Course: CRJS 2015
• Professor: Dawn Rault

Document Summary

Univariate analysis: examination of the distribution of cases of only one variable. Measures of central tendency: mode: most frequent response, mean: division of the sum of all attributes (average, median: middle value in the ranked distribution or the midpoint between observation; If the data set is (cid:449)eird, the (cid:373)ea(cid:374) (cid:449)ould(cid:374)"t represe(cid:374)t. ske(cid:449)ed s(cid:272)ores. More appropriate form of central tendency: nominal mode: yes, median: no, mean: no, ordinal mode: yes, median: yes, mean: no. Interval mode: yes, median: yes, mean: yes: ratio mode: yes, median: yes, mean: yes. Measures of dispersion: ways in which we describe how different our respondents are in a certain variable. Range: distance separating highest and lowest observations (0-45). Standard deviation: average dispersion of all values from mean. The smaller the standard deviation the more tightly the values are clustered around the mean. Sub-group comparisons: we can compare between groups, mru vs university of calgary. X axis always straight horizontal, y axis always up down vertical.