©G Dear 2010 – Not to be sold/Free to use

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©G Dear 2010 – Not to be sold/Free to use Displaying Single Data Sets Applied Mathematic (Preliminary General 1) Range and IQR with FDT Stage 6 - Year 11 Press Ctrl-A ©G Dear 2010 – Not to be sold/Free to use

Interquartile Range = Q3 – Q1 Frequency Distribution Tables & IQR. Interquartile Range = Q3 – Q1 Class Class-Centre f cf 0-4 5-9 10-14 15-19 20-24 25-29 30-34 Median = 31÷2=15.5 16th score 17 (0+4)÷2 2 2 2 Q1 = 8th & 9th scores 16÷2=8 12 12 + (5+9)÷2 7 3 5 Q3 = 16+16÷2=24 24th & 25th scores 22 22 + (10+14)÷2 12 5 10 6th to 10th scores + IQR = 22 - 12 (15+19)÷2 17 9 19 11th to 19th scores + = 10 (20+24)÷2 22 7 25 20th to 25th scores + Range = 34 - 0 (25+29)÷2 27 4 29 + = 34 (30+34)÷2 32 2 31 End of Show