﻿<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" 
        xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">
  <!-- Main Pages -->
  <url>
    <loc>https://thestatsigma.com/</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
    <image:image>
      <image:loc>https://thestatsigma.com/assets/logo.png</image:loc>
      <image:title>StatSigma - Free Statistical Analysis Tools</image:title>
    </image:image>
  </url>
  
  <!-- Tools Directory -->
  <url>
    <loc>https://thestatsigma.com/tools</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- Legal Pages -->
  <url>
    <loc>https://thestatsigma.com/privacy</loc>
    <lastmod>2025-06-30</lastmod>
    <changefreq>yearly</changefreq>
    <priority>0.3</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/terms</loc>
    <lastmod>2025-06-30</lastmod>
    <changefreq>yearly</changefreq>
    <priority>0.3</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/cookie</loc>
    <lastmod>2025-06-30</lastmod>
    <changefreq>yearly</changefreq>
    <priority>0.3</priority>
  </url>

  <!-- High-Value: SPC & Process Capability -->
  <url>
    <loc>https://thestatsigma.com/tools/control_chart_maker</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
    <image:image>
      <image:loc>https://thestatsigma.com/assets/main.png</image:loc>
      <image:title>Control Chart Generator - X-bar R, I-MR, C-chart</image:title>
    </image:image>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/cpk_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/process_capability_analysis</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- High-Value: Hypothesis Testing -->
  <url>
    <loc>https://thestatsigma.com/tools/anova_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/t_test_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/chi_square_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/regression_analysis</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- Six Sigma DMAIC Tools -->
  <url>
    <loc>https://thestatsigma.com/tools/fishbone_diagram_tool</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/sipoc_generator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
<url>
    <loc>https://thestatsigma.com/tools/gantt_chart_maker</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/affinity_diagram</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/project_charter</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/house_of_quality</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/voice_of_customer</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/kaizen_event</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/five_whys_template</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/root_cause_analysis_template</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/kano_model</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/grpi_model</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/kanban_board</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>

  <!-- Statistical Process Control -->
  <url>
    <loc>https://thestatsigma.com/tools/six_sigma_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/dpmo_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/statistical_process_control</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/xbar_r_chart</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/p_chart</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/histogram_maker</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/pareto_chart_maker</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>

  <!-- MSA -->
  <url>
    <loc>https://thestatsigma.com/tools/measurement_system_analysis</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/gage_r_and_r_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- Advanced Statistics -->
  <url>
    <loc>https://thestatsigma.com/tools/design_of_experiments</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/z_test_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/f_test_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/simple_linear_regression</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/logistic_regression</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/mann_whitney_test</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/wilcoxon_signed_rank_test</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>

  <!-- Project Management -->
  <url>
    <loc>https://thestatsigma.com/tools/pert_cpm_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>

  <!-- Operations Research -->
  <url>
    <loc>https://thestatsigma.com/tools/linear_programming_solver</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/eoq_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/queuing_theory_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/inventory_abc_analysis</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/safety_stock_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>
  <url>
    <loc>https://thestatsigma.com/tools/reorder_point_calculator</loc>
    <lastmod>2026-02-08</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.6</priority>
  </url>
</urlset>
