What's a intequartile? its a term in maths!
http://mathworld.wolfram.com/InterquartileRange.html
The term "interquartile" refers to a statistical measure used in mathematics and data analysis called the interquartile range (IQR).
The interquartile range is a measure of statistical dispersion. It is calculated as the difference between the upper quartile (Q3) and the lower quartile (Q1) in a dataset. The lower quartile is the median of the lower half of the data, and the upper quartile is the median of the upper half of the data.
To compute the interquartile range, you need a dataset with numerical values. Here are the steps to find the interquartile range:
1. Sort the dataset in ascending order.
2. Find the median of the entire dataset. This is the second quartile (Q2).
3. Locate the lower quartile (Q1), which is the median of the lower half of the data. It represents the 25th percentile of the dataset.
4. Locate the upper quartile (Q3), which is the median of the upper half of the data. It represents the 75th percentile of the dataset.
5. Calculate the interquartile range (IQR) by subtracting Q1 from Q3: IQR = Q3 - Q1.
The interquartile range is often used to identify and analyze the spread of data, especially in box plots and data distributions. It provides a more robust measure of variability compared to the range, as it is less affected by extreme outliers.