PSYC 2250 Chapter 12: Chapter 12
24 Sep 2018
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Chapter 12: understanding research results: describing variables and. Choosing the appropriate statistical analyses and graphs depends crucially on each variable"s scale of measurement. Nominal scale: levels of variables are different categories or groups that have no numerical properties. Ordinal scales: rank order levels from lowest to highest, but the intervals between each rank order are not equal. Interval scale: variables have spaces between the levels are equal in size: there is no absolute zero point, describing each variable: after collecting data, it is time to analyze the results. Frequency distribution: an arrangement of a set of scores from lowest to highest that indicates the number of times each score was obtained. Are often depicted graphically to enable a quick visual inspection. You can tell whether there are any outliers (scores that are extremely distant from the rest of the scores in a data set)
