Interquartile range calculator

For interquartile range calculation, please enter numerical data separated with comma (or space, tab, semicolon, or newline). For example: 498.3 315.8 -788.9 239.0 808.6 -621.0 698.8 138.7 -473.7 964.7 167.6 534.2 773.0

Interquartile range (IQR)

Interquartile range (IQR) is the difference between the third Q3 and the first quartile Q1 in statistics. Use this calculator to find the interquartile range from the set of numerical data.

How to enter data as a frequency table?

Simple. First-type data elements (separated by spaces or commas, etc.), then type f: and further write frequency of each data item. Each element must have a defined frequency that count of numbers before and after symbol f: must be equal. For example:

1.1 2.5 3.99
f: 5 10 15

How to enter a grouped data?


This grouped data you can enter:
10-20 20-30 30-40
f: 5 10 15

How to enter data as a cumulative frequency table?


10 20 30 40 50 60 70 80
cf: 5 13 20 32 60 80 90 100
