Upper Quartile Formula For Grouped Data. Average of 2nd and 3rd terms. For continuous frequency distribution the formula for ith quartile is.
This short video details the steps to follow in order to calculate the 1st quartile value of a grouped frequency distribution. 20 21 2 20 5 lower quartile. There are two methods of calculating quartiles lower quartiles middle quartiles and upper quartiles for grouped data which are the formula method and th.
First lets arrange of the values in an ascending order.
Upper quartile q3 48 4 12 th data point. Quartile formula for grouped data. N 9 so which becomes 3 after rounding up. Average of 2nd and 3rd terms.
