Graziano & Raulin
Research Methods (9th edition)
Descriptive Statistics
for Score Data
Score data has the properties of identity, magnitude, and equal intervals but may or may not have a true zero. That means that all descriptive statistics are suitable for score data.
Measures of Central Tendency
The most appropriate measure of central tendency for score data is the mean, although both the median and mode could also be used.
| Mean Computed Manually |
| Mean Computed with SPSS |
| Median Computed Manually |
| Median Computed with SPSS |
| Mode Computed Manually |
| Mode Computed With SPSS |
Measures of Variability
The most appropriate measures of variability for ordered data are the variance and standard deviation. The standard deviation is the square root of the variance..
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