MODR 1711 Lecture Notes - Lecture 21: Collectively Exhaustive Events, Reference Group, Internal Validity
13 Apr 2018
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Document Summary
Totals are the simplest type of statistic that result from adding up a set of units. Ratios are totals expressed in relative terms a way of comparing totals to other relevant data. Ratios allow us to make meaningful comparisons by ensuring that we are comparing commensurate things with the same definition. E. g. , the murder rate in toronto per capita. A frequency is about how many members in a class have a particular property. An absolute frequency states the actual number of s that are p. Relative frequency states the proportion of ss that are ps. 56% of york students are female, or 98,214 york students are female. A distribution organizes a class into subclasses and outlines the frequency of each subclass. Of all york students 40% are in the humanities, 30% are in the sciences, 10% are in business programs, and 20% are in the social sciences. An average tells us something general about a particular class.
