3rd Quartile Formula For Grouped Data. Jan 31 2019 THE FOLLOWING FORMULA IS USED IN FINDING THE QUARTILES OF GROUPED DATA kN cfb- Qk LB 4 FQK i Where. Now lets calculate the Median Lower Quartile.
The cumulative frequency just greater than or equal to 2625 is 31. Average of 7th and 8th terms. Lower Quartile Q1 N1 1 4.
Upper Quartile Lower Quartile.
The cumulative frequency just greater than or equal to 2625 is 31. Quartile formula for grouped data Quartiles are the values of arranged data which divide whole data into fourequal parts. They are 3 in numbers namely Q_1 Q_2 and Q_3. LB lower boundary of Qk class N total frequency cfb cumulative frequency of the class before the Qk class FQk frequency of the Qk class i size of the class interval k nth quartile where n 1 2 and 3.
