measures of dispersion

• What do measures of dispersion inform us about?

  The spread of data
• Which types of data can the range be calculated with?

  Interval and ordinal data
• Why is the range easier to calculate than standard deviation?

  It involves simpler arithmetic operations
• What is a disadvantage of using the range?

  It may inaccurately portray data spread
• What does standard deviation express?

  The spread of data around the mean
• What does a higher standard deviation indicate?

  Greater spread of data from the mean
• Why is standard deviation considered more sensitive than range?

  It uses all values in the calculation
• How does standard deviation relate to anomalous scores?

  It is less influenced by extreme scores
• What is a disadvantage of calculating standard deviation?

  It is time-consuming and complex