Math
Mean median mode.
Definition
Three measures of central tendency used to describe the center of a data set. The mean is the arithmetic average, the median is the middle value when data is ordered, and the mode is the most frequently occurring value.
Examples
Real-world.
- 1 For {2, 3, 5, 5, 9}: mean = 4.8, median = 5, mode = 5
- 2 In a skewed salary distribution, the median is often more representative than the mean
- 3 A shoe store uses mode to determine which shoe size to stock the most
Key Fact
Mean = sum of values รท number of values; Median = middle value; Mode = most frequent value
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