How do i find out the upper and lower quartile and the inter quartile range on the follwing numbers.?

106 103 120 120 76 65 88 84 120 65 102 98 87 64 61 99 120 120 120 102 65.How do i find out the upper and lower quartile and the inter quartile range on the follwing numbers.?Put them in order first, then find the median (middle number). That divides you into two halves. Find the middle number of the lower half - that's the lower quartile. Likewise for the upper half - that's the upper quartile.



In this case, you're going to have two middle numbers for your lower and upper quartile. Take the average of the two numbers to find the quartiles.