Lower And Upper Quartile Range. Lower quartile or first quartile median or second quartile upper quartile or third quartile interquartile range upper quartile lower quartile 39 13 26. Upper quartile q3 n 1 3 4.
At q 2 split the ordered data set into two halves. The lower quartile q 1 is the median of the lower half of the data. The upper quartile q 3 is the median of the upper half of the data.
When evaluating the quartiles always remember to first arrange the data in increasing order.
To find the lower quartile using the formula use q1 1 4 n 1 or enter 1 into the excel function instead of 3. Lower quartile or first quartile median or second quartile upper quartile or third quartile interquartile range upper quartile lower quartile 39 13 26. Middle quartile q2 n 1 2 4. Range largest value smallest value 65 5 60.
