Shows us how consistent the results are. The smaller the more the consistency, the bigger the number the more discrepancy. Lower measures of dispersion show more consistent and reliable results
Range – the highest score minus the lowest score. A higher range means more dispersion of results.
Best for ordinal data because you don’t end up with a decimal. :)
Massively influenced by anomalies :(
Standard deviation – a more precise calculation that uses all scores. A higher SD shows that the scores are more dispersed from the mean.
Strength: uses all scores to calculate the mean. :)
More sensitive - mostly used for interval or ratio. :(
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