Bureau Home » Water Information » Water Dictionary » percentile

• Water Information
  • Water data
    • Design Rainfalls
    • Geofabric
    • Groundwater Information
    • Hydrologic Reference Stations
    • Murray-Darling Basin Water Information
    • Water Markets Information
    • Water Data Online
  • Water status
    • Water Assessments
    • National Water Account
    • Urban National Performance Report
    • Urban Water Information
    • Water Restrictions
    • Water Storage
  • Water forecasts
    • Floods
    • 7-day Streamflow Forecasts
    • Seasonal Streamflow Forecasts
• Regulations
  • Find your organisation
  • About the Regulations
    • Background
    • Principles and Policies
    • Categories of Persons
    • Categories of Water Information
    • Subcategories of Water Information
    • Amendments
    • Regulator performance framework
    • Interagency Working Group report
  • Regulations Data
    • Data Format Requirements
    • Data Delivery
    • Metadata and Contextual Information
    • Data Licensing
  • Incorporated documents
    • Commercially Sensitive Sites
    • Metadata and Contextual Information Requirements
    • Persons and Classes of Persons
    • Urban Water Management Information Requirements
• Standards
  • Water Data Transfer Format
    • About WDTF
    • Download WDTF
    • WDTF Validation
    • WDTF Tools
    • WDTF FAQ
  • About Standards
  • Collaborative Approach
    • National Industry Guidelines for hydrometric monitoring
    • National Industry Guideline for water quality metadata
  • Water Accounting Standards
    • Australian Water Accounting Standards
    • Resources
    • Development
    • Frequently asked questions
  • Flood Warning Standard
• About
  • Water information role
  • Water contacts
  • Publications
  • Video

Australian Water Information Dictionary

percentile

One of a series of threshold values that divides a set of ordered data into 100 groups with an equal number of data points in each.

For example, consider a dataset of annual rainfall totals arranged in increasing order. The 20th percentile is a value with 20% of the data below it and 80% above it. The 90th percentile is a value with 90% of the data below it and 10% above it.

Related: quantile

This definition applies to:

• Glossary for Water status: Australian Water Resources Assessment
• Glossary for Water forecasts: 7-day Streamflow Forecasts
• Glossary for Water forecasts: Seasonal streamflow

Water links

• Murray Darling Basin water information
• Water Act 2007
• Water Regulations 2008
• Water market information
• Water Dictionary
• Publications
• Contact Us