IQ stands for intelligence quotient.
Supposedly, it is a score that tells one how “bright” a person is compared to other people. The average IQ is by definition 100; scores above 100 indicate a higher than average IQ and scores below 100 indicate a lower that average IQ. Theoretically, scores can range any amount below or above 100, but in practice they do not meaningfully go much below 50 or above 150.
Half of the population have IQ’s of between 90 and 110, while 25% have higher IQ’s and 25% have lower IQ’s:
<TABLE style="FONT-SIZE: 11pt" align=center bgColor=white><TBODY><TR><TD style="FONT-SIZE: 12pt" colSpan=3>Descriptive Classifications of Intelligence Quotients</TD></TR><TR><TD colSpan=3> </TD></TR><TR><TD>IQ</TD><TD>Description</TD><TD>% of Population</TD></TR><TR><TD>130+</TD><TD>Very superior</TD><TD>2.2%</TD></TR><TR><TD>120-129</TD><TD>Superior</TD><TD>6.7%</TD></TR><TR><TD>110-119</TD><TD>High average</TD><TD>16.1%</TD></TR><TR><TD>90-109</TD><TD>Average</TD><TD>50%</TD></TR><TR><TD>80-89</TD><TD>Low average</TD><TD>16.1%</TD></TR><TR><TD>70-79</TD><TD>Borderline</TD><TD>6.7%</TD></TR><TR><TD>Below 70</TD><TD>Extremely low</TD><TD>2.2%</TD></TR></TBODY></TABLE>