Lower Quartile. First one q1 which is also called the lower quartile is equal to the data at the 25 th percentile of the given set. The median of the entire set corresponds to the second quartile whereas the median of the highest set corresponds to the highest or third quartile.
How to calculate quartiles order your data set from lowest to highest values. Use the median to divide the ordered data set into two halves. Find the median lower quartile upper quartile interquartile range and range of the following numbers.
And the interquartile range is.
Lower quartile 4 5 6 9. The lower quartile value is the median of the lower half of the data. Quartile 1 q1 4 4 2 4. If there is an even number of data items then we need to get the average of the middle numbers.
