Creating percentiles and medians
Quick reference
To create a percentile element using factors, type:
n30[element_text];fac=factor[;dec=dec_places]
factor is 50 for a median but can be any number between 1 and 100 depending on the calculation required.
To create a percentile element using values from the data, type:
n01[element_text];inc=variable;percentile=factor;c=log_expr
factor is 25 for a quartile but can be any number between 1 and 100 depending on the calculation required.
More information
There are two ways of calculating percentiles: with factors (fac=) or with multipliers (inc=). Multipliers are more accurate and are used when the data contains the actual answer the respondent gave rather than a code representing a range of responses. Factors are used when responses have been coded into ranges.
See
See also