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10 cards from this deck
Statistical values describing the centre/typical value of a dataset
μ\muμ (mu)
x‾\overline{x}x (x-bar)
x‾=∑xn\overline{x} = \frac{\sum x}{n}x=n∑x
x‾=∑fx∑f\overline{x} = \frac{\sum fx}{\sum f}x=∑f∑fx
The middle value when data is arranged in order
Average the n2\frac{n}{2}2n and (n2+1)\left(\frac{n}{2} + 1\right)(2n+1) scores
The value that appears most frequently in a dataset
Data with two modes
Approximate (uses class centres not actual scores)
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