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Mean From a frequency Table. What is to be learned. Most effective way to calculate mean from a frequency table. Class Survey. Mean = Total Number of Pets ÷ Pupils in Class. Total Pets? 5 pupils have 1 pet 7 pupils have 2 pets 6 pupils have 3 pets 2 pupils have 4 pets Total Pets =
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What is to be learned • Most effective way to calculate mean from a frequency table
Class Survey Mean = Total Number of Pets ÷ Pupils in Class
Total Pets? 5 pupils have 1 pet 7 pupils have 2 pets 6 pupils have 3 pets 2 pupils have 4 pets Total Pets = Can show this on Frequency table + 6 X 3 + 2 X 4 5 X 1 + 7 X 2
Mean = Total Number of Pets ÷ Pupils in Class 5X1 + 7X2 + 6X3 + 2X4 Mean = 45 ÷ 20 = 2.25 Pets X Frequency 5 14 18 8 No of Pupils 20 Total Pets 45
Calculating Mean From a Frequency Table Need to add extra column
Group of Aliens Toes X Frequency 2 3 4 5 10 5 7 9 2 21 36 10 Total Aliens Total Toes 23 77 Mean = 77 ÷ 23 = 3.3 toes
