Glossary
Mode
The mode is the most frequently occurring value in a dataset. It is the only measure of central tendency that can be used with nominal (categorical) data, where calculation of the mean or median is impossible. A distribution may have one mode (unimodal), two modes (bimodal), o...
Definition
The mode is the most frequently occurring value in a dataset. It is the only measure of central tendency that can be used with nominal (categorical) data, where calculation of the mean or median is impossible. A distribution may have one mode (unimodal), two modes (bimodal), or more than two modes (multimodal).
Why It Matters
In categorical data — such as blood type, favourite colour, or diagnostic category — the mode tells you which category is most common. Even with continuous data, multimodality can reveal distinct subgroups within the sample that warrant separate analysis. The mode is simple to communicate and requires no assumptions about the shape of the distribution.
Example
A survey asks 500 respondents to name their preferred social-media platform. The responses are: Instagram (180), TikTok (150), X (100), Facebook (50), and LinkedIn (20). The mode is Instagram because it has the highest frequency. A researcher studying adolescent media habits would conclude that Instagram is the dominant platform in this sample and might design interventions specifically for that channel.
Related Terms
- Mean
- Median
- Categorical Variable (if added to staging)
Software Notes
- SPSS: Analyze > Descriptive Statistics > Frequencies. The mode is reported in the Statistics table if selected. For categorical variables, the mode is the category with the highest frequency in the frequency table.
- R:
modeest::mlv(x, method = "mfv")from themodeestpackage. For a simple table:names(sort(table(x), decreasing = TRUE))[1]. - Stata:
tabulate varnameshows frequencies; the mode is the value with the highest count.egen mode_var = mode(x), minmodecreates a variable containing the mode.