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Unformatted text preview: Measurements of Variation or Dispersion Measurements of the Central Score= The Mean • The mean is the sum of all the scores divided by the total number of scores • The median is the middle score when we arrange all the scores in order from lowest to highest Measurements of the Central Score: The mode • The mode is the number that repeats most frequently Measurements of Variation: • The standard deviation (SD) is a measurement of the amount of variation among scores in a normal distribution • The more closely the scores are clustered around the mean, the smaller the standard deviation is • SDs are used to make meaningful comparisons on different tests or on different versions of the same kind of test Descriptive Statistics Sign up on Experometrix...
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- Spring '08
- Psychology, Descriptive statistics, Falsifiability, Central Score Measurements, procedures Descriptive statistics, Experometrix