CENTRAL TENDENCY: Mean, Median, Mode

[Pages:32]CENTRAL TENDENCY: Mean, Median, Mode

New Statistical Notation

? : sigma

? The symbol means to sum (add) the scores

Central Tendency

What Is Central Tendency?

? A score that indicates where the center of the distribution tends to be located.

? Tells us about the shape and nature of the distribution.

Measures of Central Tendency

? Mode ? Median ? Mean

The Mode

? The most frequently occurring score.

? Typically useful in describing central tendency when the scores reflect a nominal scale of measurement.

The Mode

? It does not make sense to take the average in nominal data.

? Gender: 67 males --- 1 50 females ---- 2

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Score

17 16 15 14 13 12 11 10

f

1

What is the mode?

0

4

6

4

1

1

1 N=18

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