Stat-Tree™
The Voluntary Product Accessibility Template, or VPAT® of the Information Technology Industry Council, is a tool that administrators and decision-makers can use to evaluate Stat Tree's conformance with the accessibility standards under Section 508 of the Rehabilitation Act and WCAG 2.2 AA.
Stat Tree LLC is committed to ensuring Stat-Tree.com is inclusive and meets the diverse accessibility needs of users. Stat Tree strives for WCAG 2.2 Level A/AA and Section 508 conformance. Regular testing is conducted to identify conformance issues, with processes in place for timely remediation of accessibility issues that are identified. The statements below are accurate as of the date indicated.
Stat Tree has been evaluated manually and by using the WebAIM WAVE Firefox Extension technology which tests to WCAG 2.1 standards. Testing is regularly conducted using automated tools and coding best practices. Third party accessibility evaluation occurs regularly with internal audits conducted with each release. Mechanisms are in place for logging and fixing accessibility defects.
August 16, 2025
Stat Tree certifies the website to be substantially conformant with Level A and Level AA of the Web Content Accessibility Guidelines version 2.2. Conformance issues that pose a significant barrier for users with disabilities have been addressed. Stat Tree has utilized tools from WebAIM.org to assess conformance. WebAIM.org is an independent evaluator and has no commitments or conflicts with Stat Tree LLC or its principal, H. Paul LeBlanc III.
The elements of the website evaluated include all pdf files, all html files, and all png and svg image files. These elements include but are not limited to general navigation, embedded links, embedded videos, etc.
Name of Product: Stat-Tree.com (Version 7.0)
Product Description: Stat-Tree.com is a web-based educational tool demostrating how to select, conduct and report the results of statistical tests.
Date: September 3, 2025
Contact Information: help@stat-tree.com
Evaluation Methods Used: Manual and automated testing by Stat Tree and by using WebAIM WAVE Technology and other accessibility technologies including accessibility checkers in Abobe Acrobat (Version 2025.001.20577), and Mozilla Firefox (Version 141.0).
Applicable Standards/Guidelines: This report covers the degree of conformance for the following accessibility standard/guidelines:
Revised Section 508 standards as published by the U.S. Access Board in the Federal Register on January 18, 2017 and corrected on January 22, 2018.
Web Content Accessibility Guidelines (WCAG) 2.2 (Level A/AA).
The terms used in the Conformance Level information are defined as follows:
Supports: The functionality of the product has at least one method that meets the criterion without known defects or meets with equivalent facilitation.
Partially Supports: Some functionality of the product does not meet the criterion.
Does Not Support: The majority of product functionality does not meet the criterion.
Not Applicable: The criterion is not relevant to the product.
This table documents conformance of Stat Tree (including web content, electronic documents, software components, and authoring systems) with WCAG 2.2.
| Criteria | Conformance Level | Remarks and Explanations |
|---|---|---|
| 1.1.1 Non-text Content |
Supports | Stat Tree provides text alternatives to default non-text content. |
| 1.2.1 Audio-only and Video-only (Prerecorded) |
Supports | Stat Tree does not contain audio-only or video-only content by default. |
| 1.2.2 Captions (Prerecorded) |
Supports | Stat Tree contains video with audio by default. All embedded videos contain closed-captioning and downloadable, accessible transcripts. |
| 1.2.3 Audio Description or Media Alternative (Prerecorded) |
Supports | Stat Tree contains video with audio by default. Audio for all embedded videos is fully descriptive of the video content. |
| 1.2.4 Captions (Live) |
Not Applicable | Stat Tree does not contain live audio or video functionality. |
| 1.2.5 Audio Description (Prerecorded) |
Supports | Stat Tree contains prerecorded video. Audio for all embedded videos is fully descriptive of the video content. |
| 1.3.1 Info and Relationships |
Supports | Stat Tree information, structure, and relationships can be programmatically determined or are available in text. |
| 1.3.2 Meaningful Sequence |
Supports | Stat Tree maintains consistent structures allowing correct reading sequences to be programmatically determined. |
| 1.3.3 Sensory Characteristics |
Supports | Instructions for using Stat Tree do not rely on sensory characteristics. |
| 1.3.4 Orientation |
Supports | Stat Tree does not restrict usage to a single display orientation. |
| 1.3.5 Identify Input Purpose |
Supports | Stat Tree does not collect user input. |
| 1.4.1 Use of Color |
Supports | Stat Tree does not convey information by color alone. |
| 1.4.2 Audio Control |
Supports | Stat Tree does not contain prerecorded audio. |
| 1.4.3 Contrast (Minimum) |
Supports | Stat Tree provides a minimum 4.5:1 contrast ratio. |
| 1.4.4 Resize text |
Supports | Stat Tree text can be resized to 200 percent without loss of content or functionality. |
| 1.4.5 Images of Text |
Supports | Images of text are not utilized by Stat Tree. |
| 1.4.10 Reflow |
Supports | Stat Tree pages can be presented at 320x256 resolution or viewport width of 1280 CSS pixels wide at 400% zoom without loss of information or functionality. |
| 1.4.11 Non-text Contrast |
Supports | Stat Tree graphical objects and user interface elements meet or exceed a minimum 3:1 contrast. |
| 1.4.12 Text Spacing |
Supports | Stat Tree users can change text spacing without loss of content or functionality. |
| 1.4.13 Content on Hover or Focus |
Supports | Stat Tree buttons meet or exceed minimum 3:1 contrast ratio while hovered. |
| 2.1.1 Keyboard |
Supports | Stat Tree functionality is keyboard-operable. |
| 2.1.2 No Keyboard Trap |
Supports | Stat Tree does not trap focus when navigated by keyboard. |
| 2.1.4 Character Key Shortcuts |
Supports | Stat Tree does not include character key shortcuts. |
| 2.2.1 Timing Adjustable |
Supports | Stat Tree does not time-out interface elements or content by default. |
| 2.2.2 Pause, Stop, Hide |
Supports | Stat Tree does not contain moving, blinking, scrolling, or auto-updating content. |
| 2.3.1 Three Flashes or Below Threshold |
Supports | Stat Tree does not contain any blinking content. |
| 2.4.1 Bypass Blocks |
Supports | Stat Tree has “Skip to Content” links to allow users to easily bypass navigation elements that are repeated on multiple pages. |
| 2.4.2 Page Titled |
Supports | Pages in Stat Tree have appropriate titles to describe their purpose. |
| 2.4.3 Focus Order |
Supports | Navigating Stat Tree by keyboard or screen reader occurs in consistent and logical sequence, generally top-to-bottom and left-to-right. |
| 2.4.4 Link Purpose (In Context) |
Supports | The purpose of each link in Stat Tree is clearly identified by its text, supplemented with labels when necessary. |
| 2.4.5 Multiple Ways |
Supports | Stat Tree pages can be navigated in multiple ways, following consistent layouts in global and page navigation. |
| 2.4.6 Headings and Labels |
Supports | Stat Tree pages contain a single H1 header describing the purpose of its content, and additional headers always follow single-steps and maintain logical structure. |
| 2.4.7 Focus Visible |
Supports | Focus is consistently visible throughout Stat Tree when navigated by keyboard. |
| 2.4.11 Focus Not Obscured (Minimum) |
Supports | Focus is consistently visible throughout Stat Tree when navigated by keyboard. |
| 2.5.1 Pointer Gestures |
Not Applicable | Stat Tree does not require navigation by multipoint or path-based gestures. |
| 2.5.2 Pointer Cancellation |
Supports | Button actions in Stat Tree that complete on mouse-down have back and restart buttons. Other actions, such as links, can be aborted by moving the mouse away from the target area before mouse-up. |
| 2.5.3 Label in Name |
Partially Supports | Stat Tree visible and accessible labels match. Some functional control buttons are provided by a third-party vendor. |
| 2.5.4 Motion Actuation |
Supports | Stat Tree does not contain any motion operations. |
| 2.5.7 Dragging Movements |
Supports | Stat Tree does not require any dragging movements. |
| 2.5.8 Target Size (Minimum) |
Supports | Targets for pointer events in Stat Tree are larger than the minimum size of 24 by 24 CSS pixels. |
| 3.1.1 Language of Page |
Supports | All Stat Tree pages contain a defined language value. |
| 3.1.2 Language of Parts |
Supports | Multi-language content is not provided by Stat Tree. |
| 3.2.1 On Focus |
Supports | Moving focus when navigating Stat Tree never results in an action or change of context. |
| 3.2.2 On Input |
Supports | Stat Tree does not utilize input fields. |
| 3.2.3 Consistent Navigation |
Supports | Stat Tree contains consistent navigation patterns across all pages and content. |
| 3.2.4 Consistent Identification |
Supports | Stat Tree components are labeled and behave consistently across the application. |
| 3.2.6 Consistent Help |
Supports | Location of Contact details to help@stat-tree.com are located on the bottom of main and auxiliary web pages. |
| 3.3.1 Error Identification |
Supports | Stat Tree does not utilize input fields. |
| 3.3.2 Labels or Instructions |
Supports | Stat Tree does not utilize input fields. |
| 3.3.3 Error Suggestion |
Supports | Stat Tree does not utilize input fields. |
| 3.3.4 Error Prevention (Legal, Financial, Data) |
Supports | Stat Tree does not collect or utilize user data. |
| 3.3.7 Redundant Entry |
Supports | Stat Tree does not utilize input fields. |
| 3.3.8 Accessible Authenication (Minimum) |
Supports | Stat Tree does not utilize input fields, collect or store user data, or require regisitration or passwords. |
| 4.1.2 Name, Role, Value |
Supports | Stat Tree UI components generally use HTML and ARIA best practices. |
| 4.1.3 Status Messages |
Supports | Stat Tree employs status messages only when pressing the Copy citation button on script pages. The copy citation button also changes color when pressed. |
| Criteria | Conformance Level | Remarks and Explanations |
|---|---|---|
| Without Vision | Supports | Stat Tree has been optimized to work well with screen readers such as JAWS, NVDA and VoiceOver. |
| With Limited Vision | Supports | Stat Tree supports screen magnification and browser-provided zoom functionality. |
| Without Perception of Color | Supports | Stat Tree does not require color perception for operation. |
| Without Hearing | Supports | Stat Tree does not use any audio for its default operation. |
| With Limited Hearing | Supports | Stat Tree does not use any audio for its default operation. |
| Without Speech | Not Applicable | Stat Tree does not require speech for operation. |
| With Limited Manipulation | Supports | Stat Tree does not require fine motor control or simultaneous actions. It is accessible via keyboard and touch devices. |
| With Limited Reach and Strength | Supports | Stat Tree does not require fine motor control or simultaneous actions. It is accessible via keyboard and touch devices. |
| With Limited Language, Cognitive, and Learning Abilities | Supports | Stat Tree supports adaptation of content by end users and provides an easy-to-use interface for users with cognitive or learning disabilities. |
Note: These criteria are all Not Applicable because Stat Tree is not a Hardware Product.
Note: These criteria are Not Applicable as Stat Tree is a web application that does not directly access platform accessibility services. However, noteable criteria are briefly discussed regarding authoring tools.
| Criteria | Conformance Level | Remarks and Explanations |
|---|---|---|
| 504.2 Content Creation or Editing (if not authoring tool, enter “not applicable”) | Not Applicable | Stat Tree does not offer options for content creation or editing. |
| 504.2.1 Preservation of Information Provided for Accessibility in Format Conversion | Not Applicable | Stat Tree does not offer options for content creation or editing. |
| 504.2.2 PDF Export | Not Applicable | Stat Tree does not offer options for content creation or editing. |
| 504.3 Prompts | Not Applicable | Stat Tree does not offer options for content creation or editing. |
| 504.4 Templates | Not Applicable | Stat Tree does not offer options for content creation or editing. |
| Criteria | Conformance Level | Remarks and Explanations |
|---|---|---|
| 602.2 Accessibility and Compatibility Features | Supports | Stat Tree accessibility features and compatibility with assistive technology are decribed on the Stat Tree Accessibility page. |
| 602.3 Electronic Support Documentation | Not Applicable | Stat Tree contains no other documentation than what is presented within Stat-tree.com. |
| 602.4 Alternate Formats for Non-Electronic Support Documentation | Not Applicable | Stat Tree contains no other documentation than what is presented within Stat-tree.com. |
| 603.2 Information on Accessibility and Compatibility Features | Supports | Stat Tree provides information about accessibility features of Stat-Tree.com in this page and on the Stat Tree Accessibility page. |
| 603.3 Accommodation of Communication Needs | Partially Supports | Stat Tree users can contact Stat Tree via email. |