<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
Dismiss
Skip Navigation
Our Terms of Use (click here to view) have changed. By continuing to use this site, you are agreeing to our new Terms of Use.
You are viewing an older version of this Concept. Go to the latest version.

Measures of Spread/Dispersion

Range, variance, standard deviation

Atoms Practice
Estimated12 minsto complete
%
Progress
Practice Measures of Spread/Dispersion
Practice
Progress
Estimated12 minsto complete
%
Practice Now
Turn In
How Smart Was Einstein?

Credit: Laura Guerin
Source: CK-12 Foundation
License: CC BY-NC 3.0

Albert Einstein, credited as one of the greatest physicists of the 20th century, was thought to have an IQ ("Intelligence Quotient," or the score you get on an intelligence test) of 160. But what does that mean? Is that especially high or was his IQ average?

Amazing But True

IQ scores are used as descriptive statistics of individuals. Interestingly, IQ scores for people follow a standard distribution or bell curve, meaning that most people will fall into the middle of IQ scores. In fact, 50% of the population has a score between 90-110. The average IQ score is 100 and the standard deviation for IQ scores is about 15. Very few people have scores that are greater or less than two standard deviations away from the mean.

Credit: Laura Guerin
Source: CK-12 Foundation
License: CC BY-NC 3.0

Einstein did, indeed, have a high IQ. His IQ score is more than two standard deviations above the mean—only 2.2% of people have an IQ of 130 or more. However, Einstein isn’t the smartest person to have lived; Bobby Fisher, a world-famous chess player, has one of the highest determined IQs, a score of 187!

See more about interpreting IQ scores and measuring intelligence:
http://webspace.ship.edu/cgboer/intelligence.html

Explore More

If the mean and median of IQ scores is 100, what is the mode based on the distribution and variance discussed above?

Notes/Highlights Having trouble? Report an issue.

Color Highlighted Text Notes
Please to create your own Highlights / Notes
Show More

Image Attributions

  1. [1]^ Credit: Laura Guerin; Source: CK-12 Foundation; License: CC BY-NC 3.0
  2. [2]^ Credit: Laura Guerin; Source: CK-12 Foundation; License: CC BY-NC 3.0

Explore More

Sign in to explore more, including practice questions and solutions for Measures of Spread/Dispersion.
Please wait...
Please wait...