Calculadora de Amplitude Interquartil (IQR)

The Interquartile Range (IQR) Calculator is a statistical tool that measures data dispersion by calculating the difference between the third quartile (Q3) and the first quartile (Q1). The IQR represents the range containing the central 50% of the data, being less sensitive to outliers than the total range. To calculate, the data is sorted from smallest to largest, then Q1 is the median of the lower half and Q3 is the median of the upper half. The result is a number indicating data variability.

Use this calculator when you need to understand the distribution of a dataset, especially to identify outliers or compare dispersion between different groups. For example, in salary analysis, the IQR shows the variation between lower and higher salaries, excluding extremes. It is also useful in finance, quality control, and scientific research. Simply enter your numeric data separated by commas or spaces, and the calculator returns the IQR automatically.

Important caveats: IQR is calculated only for numeric and ordered data. Ensure your data is correct and contains no non-numeric values. Additionally, the method for calculating quartiles may vary; this calculator uses the standard inclusive method (Tukey). IQR should not be used alone to describe distribution; combine it with the median and other plots like boxplots for a complete analysis.