Quartile and IQR Calculator

About the Quartile and IQR Calculator

The Quartile and IQR Calculator computes the first quartile (Q1), second quartile (Q2, median), third quartile (Q3), and interquartile range (IQR = Q3 - Q1) of a dataset. This tool is ideal for students, researchers, and professionals in statistics and data analysis.

• Features:
  • Calculates Q1 (25th percentile), Q2 (median), Q3 (75th percentile), and IQR.
  • Supports integer and decimal inputs via text or keypad.
  • Validates input for valid numbers and non-empty datasets.
  • Displays results in a table and visualizes data with a box plot or histogram.
  • Supports calculation history, result copying, and PDF export via LaTeX.
• Practical Applications: Useful in statistics, data science, and research for analyzing data spread and identifying outliers.
• How to Use:
  • Enter numbers separated by commas or spaces (e.g., 1, 2, 3 or 1.5 2.5 3.5) using the text field or keypad.
  • Click "Calculate" (in the keypad or action buttons) to see Q1, Q2, Q3, and IQR in a table and a visualization of the data.
  • Optionally copy results or export to PDF.
  • Use "Clear" to reset the input.
• Helpful Tips:
  • Input must contain valid numbers (integers or decimals).
  • Separate numbers with commas or spaces; both are accepted.
  • Use the keypad to quickly input numbers, decimals, separators, or calculate.
  • Click history items to reuse previous datasets.
  • Requires at least 4 numbers for meaningful quartile calculations.
• Examples:
  • Example 1: Basic Dataset:
    • Input: 1, 2, 3, 4, 5
    • Result: Q1 = 1.5, Q2 = 3, Q3 = 4.5, IQR = 3
  • Example 2: Decimal Dataset:
    • Input: 1.5, 2.5, 3.5, 4.5, 5.5
    • Result: Q1 = 2, Q2 = 3.5, Q3 = 5, IQR = 3
  • Example 3: Invalid Input:
    • Input: 1, a, 3
    • Result: Error: Invalid number (a).

Analyze your dataset's spread with ease and share or export results for your studies or reports!