# Quartile Deviation Calculator

Calculate the quartile deviation of a set of numbers.

## About Quartile Deviation Calculator

The Quartile Deviation Calculator is used to calculate the quartile deviation of a set of numbers (Step by Step).

## Quartile Deviation

In descriptive statistics, the quartile deviation (QD) is half the difference between the third (upper) and first (lower) quartiles.

## First Quartile And Third Quartile

The first quartile, also called the lower quartile, is equal to the data at the 25th percentile of the data. The third quartile, also called the upper quartile, is equal to the data at the 75th percentile of the data.

There are several different methods for calculating quartiles. This calculator uses a method described by Moore and McCabe to find quartile values. The same method is also used by the TI-83 to calculate quartile values. With this method, the first quartile is the median of the numbers below the median, and the third quartile is the median of the numbers above the median.

## Formula

The following is the quartile deviation calculation formula:

QD = (Q3 - Q1)/2

where:

QD = quartile deviation

Q3 = third quartile

Q1 = first quartile

Reference this content, page, or tool as:

"Quartile Deviation Calculator" at https://miniwebtool.com/quartile-deviation-calculator/ from miniwebtool, https://miniwebtool.com/

You can also try our new AI Math Solver to solve your math problems through natural language question and answer.

## Related Miniwebtools:

Quartile Calculator## Statistics And Data Analysis:

- Arithmetic Mean Calculator Featured
- Average Calculator (High Precision)
- Average Deviation Calculator
- Coefficient of Variation Calculator (High Precision)
- Compound Growth Calculator Featured
- Confidence Interval Calculator
- Geometric Mean Calculator
- Harmonic Mean Calculator
- Interquartile Range Calculator
- Mean Absolute Deviation (MAD) Calculator
- Mean Calculator (High Precision)
- Mean Median Mode Calculator
- Median Absolute Deviation Calculator
- Median Calculator Featured
- Midrange Calculator Featured
- Mode Calculator
- Outlier Calculator Featured
- Population Standard Deviation Calculator (High Precision)
- Quartile Calculator Featured
- Quartile Deviation Calculator
- Range Calculator
- Relative Standard Deviation Calculator (High Precision) Featured
- Root Mean Square Calculator Featured
- Sample Mean Calculator Featured
- Sample Size Calculator
- Sample Standard Deviation Calculator
- Standard Deviation Calculator (High Precision)
- Standard Error Calculator (High Precision) Featured
- Variance Calculator (High Precision)