Determine Lower Quartile. The Quartile is the average of the two numbers. If there is an even number of data items then we need to get the average of the middle numbers.
May 12 2014 Use the methods above to find the upper quartile. The lower quartile Q1 is the median of the lower half and the upper quartile is the median of the upper half. 2st quartile median 55.
Middle Quartile Q2 N1 2 4.
This strategy is. The first quartile lower quartile QL is equal to the 25th percentile of the data. Q3 is the upper quartile or 75. Inter Quartile Range Q3 Q1 8 45 35.
