Median from Grouped Frequencies

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Presentation transcript:

Median from Grouped Frequencies 1. Add up the Frequency total. 2. Produce a cumulative frequency column 3. Add 1 to this and divide by 2 4. Count down the cumulative frequency numbers until you pass this number 5. This group gives the answer.

Median from Grouped Frequencies 1,2,4,5,3,6,7,8,4,6,4,2,4,6,7,9,3,6,3,6,8,4,7,9,4,5,2,1,5,1,7,9,3 Group Tally Frequency Cumulative Fr 1-3 4-6 7-9 1111111111 11111111111111 111111111 10 14 9 10 24 33 33 33 + 1 = 34 = 17 2 2  Ans is Group 4 - 6