Symbols (MVA command)

The symbols that are displayed in the DPATTERN and MPATTERN table cells are:

+. Extremely high value

−. Extremely low value

S. System-missing value

A. First type of user-missing value

B. Second type of user-missing value

C. Third type of user-missing value

• An extremely high value is more than 1.5 times the interquartile range above the 75th percentile, if (number of variables) × n logn ≤ 150000, where n is the number of cases.
• An extremely low value is more than 1.5 times the interquartile range below the 25th percentile, if (number of variables) × n logn ≤ 150000, where n is the number of cases.
• For larger files—that is, (number of variables) × n logn > 150000—extreme values are two standard deviations from the mean.