Statistical statements
Statements which perform statistical calculations are:
Statement | Description |
|---|
n07 | average |
n12 | mean |
n13 | sum of factors |
n17 | standard deviation |
n19 | standard error of the mean |
n20 | error variance of the mean |
n30 | medians and percentiles |
n31 | effective base |
In most cases, you enter the statement at the point at which it is to be printed. All statements are formatted in the same way, like this:
naa[text];[options]
aa is the n statement number.
The options valid on all statistical statements are dec=, id= and scale=. The n30 also needs a fac= to define the factors for each range of values.
If the table contains absolute and percentage figures, the percentages are suppressed for the rows or columns created by these elements.
Note For means and other statistics (such as standard deviations), Quantum differentiates figures in which the sum of values is zero, and those in which the sum of cases (that is, respondents) is zero. If the run or table uses the option spechar to print special characters in place of zeros, Quantum only prints the special character if the number of cases going into the mean is zero. So 0/3 is always printed as zero, whereas 0/0 is printed as the special character for zero if one has been defined.
See also