Unformatted text preview: Classification of variables Variables Quantitative
variables Continuous .
varaibles S mmarizin dat usi tabl an h The methods used for summarizing and analyzing data depend on the type of the variable. Proportion and Percentages (relative frequencies) 0 Proportion of the observations that fall in a certain category
frequency (count) of observations in that category . — total number of observations
- Percentage of the observations that fail in a certain category = Proportion ' 100 frequency (count) of observations in that category X 100
_ total number of observations Proportions and percentages are also called relative irequencies. . Fr uen T A frequency table is a listing of possible values for a variable, together with the number of observations for each value. out: A campus press polled a sample of 300 undergraduate students in order to study students’ attitude towards a proposed
change in a dormitory regulation. Summary of results of an opinion poll is as follows. Response
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- Spring '08