AQA Psychology – Research Methods Practice Test

The mode is the value that occurs most often, so finding it is basically a matter of counting how frequently each value appears and picking the highest frequency. That straightforward counting makes the mode very easy to calculate, especially in small data sets or when you have a clear frequency table. It’s also particularly useful for categorical data (nominal data) because you can simply see which category occurs most often. Keep in mind, though, that the mode isn’t always the best summary of a data set. It can be unstable if there are several values with the same highest frequency (multi-modal distributions), and it doesn’t tell you anything about how the rest of the data are spread or how large or small the values are. The other statements are misleading: the mode does identify the most common value, and it can be useful for categorical data, so those points aren’t accurate.