• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

Variability refers to the spread, or dispersion, of a group of scores. Measures of variability (sometimes called measures of dispersion) provide descriptive information about the dispersion of scores within data. Measures of variability provide summary statistics to understand the variety of scores in relation to the midpoint of the data. Common measures of variability include range, variance, and standard deviation. The present entry discusses the value of measures of variability, specifically in relation to common measures of central tendency. It also provides basic information about three common measures of variability, including how to calculate the measures.

Value of Measures of Variability

Although researchers often place focus on measures of central tendency, such as mean, median, and mode, measures of central tendency provide an incomplete picture of ...

    • Loading...
    locked icon

    Sign in to access this content

    Get a 30 day FREE TRIAL

    • Watch videos from a variety of sources bringing classroom topics to life
    • Read modern, diverse business cases
    • Explore hundreds of books and reference titles