Upper Quartile Formula For Grouped Data. Here q 1 is first quartile q 2 is second quartile and q 3 is third quartile. 10 1 11 q1 will be.
Qi i n 4 th value i 1 2 3. The lower quartile value is the 3rd data point q1 4. So upper quartile q3 11.
Interquartile range q3 q1.
For continuous frequency distribution the formula for ith quartile is. Interquartile range is calculated using the formula given below. They are 3 in numbers namely q 1 q 2 and q 3. Upper quartile q3 48 4 12 th data point.
