im using the median to find out the IQR i found that 157.5 is the IQR of the data set below. I keep checking with different calculators but the answers are different
34, 96, 112, 121, 148, 175, 211, 231, 236, 276, 285, 299, 324, 434, 457.
May someone confirm my answer
I just cut and pasted your data into this "calculator" and got 178
http://www.statisticshowto.com/calculators/interquartile-range-calculator/