A frequency table shows each value and how many times it occurs. To find the mean, multiply each value by its frequency, add these products and divide by the total frequency.
The mode is the value with the highest frequency. For the median, find the position (n + 1)/2 and count down the frequencies until you reach it. With 33 matches, the median is the 17th value.
Worked example
Goals 0, 1, 2 have frequencies 5, 8, 7. Find the mean.
- Products: 0 × 5 + 1 × 8 + 2 × 7 = 22.
- Total frequency 20: 22 ÷ 20 = 1.1.
Answer:1.1 goals
Key words
- frequency
- how many times a value occurs
- total frequency
- the sum of the frequencies
- median position
- (n + 1)/2
Practise this
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Common Core-referenced: HSS-ID.A.2