IQR Analysis Calculator
Expert Guide to IQR Analysis
Introduction & Importance
IQR, or Interquartile Range, is a measure of statistical dispersion. It’s the range between the first quartile (Q1) and the third quartile (Q3) of a dataset…
How to Use This Calculator
- Enter the minimum, maximum, first quartile (Q1), and third quartile (Q3) values.
- Click ‘Calculate’.
- View your results below the calculator.
Formula & Methodology
The IQR is calculated as Q3 – Q1. Outliers are defined as values less than Q1 – 1.5 * IQR or greater than Q3 + 1.5 * IQR…
Real-World Examples
| Data Set | Q1 | Q3 | IQR |
|---|---|---|---|
| Salaries | 50,000 | 100,000 | 50,000 |
| Test Scores | 70 | 90 | 20 |
Data & Statistics
| Statistic | Formula | IQR’s Role |
|---|---|---|
| Median | Q2 = (Q1 + Q3) / 2 | IQR helps find Q1 and Q3 |
| Mode | Most frequent value | IQR doesn’t affect mode |
Expert Tips
- IQR is resistant to outliers.
- It’s useful for comparing datasets with different means.
- IQR can help identify outliers for further analysis.
Interactive FAQ
What is an outlier?
A value that is significantly different from other values in the dataset.
How do I find the median?
The median is the middle value when a dataset is ordered from least to greatest.