What percentage of Weschler intelligence test scores fall between -1 standard deviation (-15 pts) and +1 standard deviation (+15 pts) around the mean (100 pts)?
0.1%

• 17%
• 34%
• 68%
• 2%
• What percentage of IQ falls in one standard deviation?
  What percentage of the population fall within 1 standard deviation of the mean on IQ tests in either direction?

  approximately 68%

  Therefore, approximately 68% of the population is located within one standard deviation above or below the mean.