Mode
Definition
The value that appears most frequently in a dataset. Most informative for discrete or categorical data; for continuous measurement data it is rarely the primary summary statistic but can indicate clustering.
- Definition type
- Most frequent value in a dataset
- Best suited to
- Discrete or categorical data
- Continuous data role
- Indicates clustering, rarely the primary summary
- Can have
- More than one mode (bimodal, multimodal)
Common questions
Why is the mode less useful than the mean or median for continuous forensic measurements?+
Continuous measurements such as height or drug concentration rarely repeat exact values, so a computed mode from raw data can be uninformative or arbitrary unless the data is first binned into intervals.
When would a forensic analyst prefer the mode over the mean?+
For categorical evidence, such as the most common blood type or the most frequent manner-of-death classification in a series, the mode directly answers which category occurs most often, which the mean cannot do.
Related terms
- Mean
- The arithmetic average of a dataset, calculated as the sum of all values divided by the number of values. Sensitive to extreme...
- Median
- The middle value of a dataset sorted in ascending or descending order. For an even number of values, it is the average...
- Refractive Index (RI)
- A physical property of glass measuring how much light bends as it passes through. RI is the primary discriminating characteristic used in...
- Standard Deviation
- The square root of the variance. Expressed in the same units as the original measurement, making it interpretable as a typical distance...
- Variance
- The average of the squared deviations from the mean. Because it squares the original unit of measurement, variance is not directly interpretable...