[khanar]

what is correct IQ range
Kaplan said 20 to 35
FA said 20 to 40 (page 413 2008 edition)

 

[Sabio]

Mental Retardation IQ Levels

The correct range is 20 to 35 severe, 35 to 50 moderate, 50 to 70 mild, and less than 20 is profound.

Reference:
DSM IV Manual