Crosstabulation: Percentages
[Pages:2]Crosstabulation: Percentages
Each frequency in the table can be converted to a percentage to facilitate comparisons with other data. In essence this is a process of standardization.
Three types of percentages are commonly computed:
Column Percentages Row Percentages Total Percentages
Total Percentages
Total percentages are computed by taking each of the frequencies in our table and dividing by fTOTAL
Check: The bottom right percentage should equal 100%.
Column Percentages
Column percentages are computed by taking each of the frequencies in rows of our table and dividing by the frequency in the last row.
Check: The bottom row percentages should each be 100%.
Row Percentages
Row percentages are computed by taking each of the frequencies in columns of our table and dividing by the frequencies in the right column.
Check: The right hand column percentages should each be 100%.
The real question for the social scientist is - when do you want to look at Column %, Row % or Total % rather than the others?
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