Click on the following links. Please note these will open in a new window.

• Measures of Variability (Variance, Standard Deviation, Range, Mean Absolute Deviation)
  A link to a video demonstrating how to calculate the measures of variability
   
• Measures of Dispersion: Departures of Scores from Central Tendency
  A link to a website with explanation and examples how to calculate each of the measures of dispersion
   
• Measures of Dispersion
  A link to a website with a detailed example of how to calculate the range, variance, and standard deviation
   
• Explaining Variation and Analysis of Variance
  A link to a website with detailed explanations of the measures of dispersion and creating box plots