STA004 · Probability & statistics · Classes 6–10
Mode
The mode is the value that occurs most often. A data set can have one mode, several, or none.
most oftenMode
📐 Formula
mode = most frequent value
✏️ Worked example
2, 3, 3, 5, 7, 8, 9: 3 appears twice, so the mode is 3. Set x = 8 and there are two modes, 3 and 8.
🌍 Where it is used
Most popular shoe size, most common answer in a survey.
❓ Quick check
Mode of 4, 6, 6, 7, 9, 9, 9?
🏋️ Practice
EasyMode of red, blue, red, green?
Answer: Red
MediumMode of 1, 2, 3, 4?
Answer: No mode
ChallengeCan categorical data have a mean?
Answer: No, but it can have a mode