How To Calculate Iqr Lower Limit And Upper Limit

Calculating the Interquartile Range (IQR) lower and upper limits is crucial for identifying outliers and understanding the spread of your data. This tool simplifies the process and provides insights into your data.

1. Enter your data as a comma-separated list in the ‘Enter data’ field.
2. Enter the first quartile (Q1) and third quartile (Q3) values.
3. Click ‘Calculate’ to find the IQR lower and upper limits.

The IQR lower limit is calculated as Q1 – (1.5 * IQR), and the upper limit is Q3 + (1.5 * IQR). The IQR is calculated as Q3 – Q1.

Comparison of IQR lower and upper limits for different datasets

Dataset	IQR Lower Limit	IQR Upper Limit

• Always check for outliers before and after calculating IQR limits.
• Consider using other measures of dispersion, like standard deviation, for complete data analysis.

What is the Interquartile Range (IQR)?

The IQR is the range between the first quartile (Q1) and the third quartile (Q3) of a dataset.

Learn more about IQR from Statistics How To.

Understand box plots on Khan Academy.