How To Calculate Lower Fence Iqr

Introduction & Importance

Interquartile range (IQR) is a measure of statistical dispersion, representing the spread of the middle 50% of the data. The lower fence, also known as the first quartile (Q1), is the 25th percentile of the data. Calculating the lower fence IQR helps identify outliers and understand the distribution of your data.

For a detailed explanation of the IQR method, see the NIST Engineering Statistics Handbook.