<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      color: #1e293b;
      background: transparent;
      padding: 8px;
    }

    .grid-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      width: 100%;
    }

    @media (max-width: 540px) {
      .grid-container {
        grid-template-columns: 1fr;
      }
    }

    /* Comparison Cards */
    .compare-card {
      border-radius: 12px;
      padding: 12px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }

    .card-incorrect {
      background: #fef2f2;
      border: 1.5px solid #fecaca;
    }

    .card-correct {
      background: #f0fdf4;
      border: 1.5px solid #bbf7d0;
    }

    .card-header {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 15px;
      font-weight: 700;
    }

    .card-incorrect .card-header { color: #dc2626; }
    .card-correct .card-header { color: #16a34a; }

    /* Interactive Switcher */
    .tabs {
      display: flex;
      gap: 4px;
      background: rgba(22, 163, 74, 0.12);
      padding: 3px;
      border-radius: 8px;
      width: 100%;
      max-width: 260px;
    }

    .tab-btn {
      flex: 1;
      border: none;
      background: transparent;
      color: #166534;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 6px;
      border-radius: 6px;
      cursor: pointer;
      transition: background 0.2s, color 0.2s;
      white-space: nowrap;
    }

    .tab-btn.active {
      background: #ffffff;
      color: #15803d;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    }

    /* Tables */
    .table-wrap {
      width: 100%;
      max-width: 240px;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
      text-align: center;
      background: #ffffff;
      border-radius: 6px;
      overflow: hidden;
      box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    }

    th, td {
      padding: 5px 4px;
      border: 1px solid #e2e8f0;
      font-weight: 600;
    }

    th {
      background: #f8fafc;
      font-size: 11px;
      color: #64748b;
      font-weight: 600;
    }

    .th-corner {
      background: #f1f5f9;
    }

    /* Highlight States */
    .hl-red {
      background-color: #fee2e2 !important;
      color: #b91c1c !important;
      font-weight: 800;
    }

    .hl-green {
      background-color: #dcfce7 !important;
      color: #15803d !important;
      font-weight: 800;
    }

    .dim {
      color: #94a3b8;
      background-color: #ffffff;
    }

    .target-cell {
      background-color: #e2e8f0;
      color: #334155;
      font-weight: 800;
    }

    /* Equation & Callout */
    .equation-box {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 12px;
      font-weight: 700;
      text-align: center;
      padding: 6px 10px;
      border-radius: 6px;
      width: 100%;
    }

    .eq-incorrect {
      background: #ffffff;
      color: #b91c1c;
      border: 1px dashed #f87171;
    }

    .eq-correct {
      background: #ffffff;
      color: #15803d;
      border: 1px dashed #4ade80;
    }

    .badge {
      font-size: 11px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 999px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .badge-error {
      background: #dc2626;
      color: #ffffff;
    }

    .badge-success {
      background: #16a34a;
      color: #ffffff;
    }
  </style>
</head>
<body>

  <div class="grid-container">

    
    <div class="compare-card card-incorrect">
      <div class="card-header">
        <span>✕</span>
        <span>Incorrect</span>
      </div>

      <div class="table-wrap">
        <table>
          <tr>
            <th class="th-corner"></th>
            <th>Yes</th>
            <th>No</th>
            <th>Total</th>
          </tr>
          <tr>
            <th>Sport</th>
            <td class="hl-red">15</td>
            <td class="hl-red">15</td>
            <td class="hl-red">30</td>
          </tr>
          <tr>
            <th>No</th>
            <td class="hl-red">30</td>
            <td class="hl-red">20</td>
            <td class="hl-red">50</td>
          </tr>
          <tr>
            <th>Total</th>
            <td class="hl-red">45</td>
            <td class="hl-red">35</td>
            <td class="target-cell">160</td>
          </tr>
        </table>
      </div>

      <div class="equation-box eq-incorrect">
        4 Inner + 4 Totals = 160
      </div>

      <span class="badge badge-error">Double Counts!</span>
    </div>

    
    <div class="compare-card card-correct">
      <div class="card-header">
        <span>✓</span>
        <span>Correct</span>
      </div>

      <div class="tabs">
        <button class="tab-btn active" onclick="setMode('joint')">4 Cells</button>
        <button class="tab-btn" onclick="setMode('rows')">Row Totals</button>
        <button class="tab-btn" onclick="setMode('cols')">Col Totals</button>
      </div>

      <div class="table-wrap">
        <table>
          <tr>
            <th class="th-corner"></th>
            <th>Yes</th>
            <th>No</th>
            <th>Total</th>
          </tr>
          <tr>
            <th>Sport</th>
            <td id="c11" class="hl-green">15</td>
            <td id="c12" class="hl-green">15</td>
            <td id="r1" class="dim">30</td>
          </tr>
          <tr>
            <th>No</th>
            <td id="c21" class="hl-green">30</td>
            <td id="c22" class="hl-green">20</td>
            <td id="r2" class="dim">50</td>
          </tr>
          <tr>
            <th>Total</th>
            <td id="col1" class="dim">45</td>
            <td id="col2" class="dim">35</td>
            <td class="target-cell" style="background:#bbf7d0; color:#14532d;">80</td>
          </tr>
        </table>
      </div>

      <div id="correctEq" class="equation-box eq-correct">
        15 + 15 + 30 + 20 = 80
      </div>

      <span class="badge badge-success">Grand Total = 80</span>
    </div>

  </div>

  <script>
    const cells = {
      joint: ['c11', 'c12', 'c21', 'c22'],
      rows: ['r1', 'r2'],
      cols: ['col1', 'col2']
    };

    const equations = {
      joint: '15 + 15 + 30 + 20 = 80',
      rows: '30 + 50 = 80',
      cols: '45 + 35 = 80'
    };

    const allIds = ['c11', 'c12', 'c21', 'c22', 'r1', 'r2', 'col1', 'col2'];

    function setMode(mode) {
      // Update buttons
      const buttons = document.querySelectorAll('.tab-btn');
      buttons.forEach(btn => btn.classList.remove('active'));
      if (mode === 'joint') buttons[0].classList.add('active');
      if (mode === 'rows') buttons[1].classList.add('active');
      if (mode === 'cols') buttons[2].classList.add('active');

      // Update table cell classes
      allIds.forEach(id => {
        const el = document.getElementById(id);
        if (cells[mode].includes(id)) {
          el.className = 'hl-green';
        } else {
          el.className = 'dim';
        }
      });

      // Update equation text
      document.getElementById('correctEq').textContent = equations[mode];
    }
  </script>
</body>
</html>

Organizing Categorical Data Using Two-Way Tables

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="aspect-ratio" content="4:3">
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; font-family: system-ui, -apple-system, sans-serif; }
    body {
      background: #ffffff;
      color: #1e2945;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      min-height: 100%;
      padding: 12px 8px;
    }

    .toolbar {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 6px;
      margin-bottom: 12px;
      width: 100%;
      max-width: 480px;
    }

    .btn {
      appearance: none;
      border: 1px solid #e2e8f0;
      background: #f8fafc;
      color: #475569;
      font-size: 13px;
      font-weight: 600;
      padding: 6px 12px;
      border-radius: 20px;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .btn:active { transform: scale(0.97); }

    .btn.active-all { background: #1e2945; color: #ffffff; border-color: #1e2945; }
    .btn.active-joint { background: #0284c7; color: #ffffff; border-color: #0284c7; }
    .btn.active-marginal { background: #d97706; color: #ffffff; border-color: #d97706; }
    .btn.active-grand { background: #059669; color: #ffffff; border-color: #059669; }

    .table-container {
      width: 100%;
      max-width: 480px;
      position: relative;
    }

    table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 4px;
      table-layout: fixed;
      font-size: 13px;
      text-align: center;
    }

    th, td {
      padding: 8px 4px;
      border-radius: 6px;
      transition: opacity 0.25s ease, box-shadow 0.25s ease;
    }

    .var-head {
      background: #f1f5f9;
      color: #334155;
      font-weight: 700;
      font-size: 12px;
    }

    .cell-joint {
      background: #e0f2fe;
      border: 1px solid #bae6fd;
      color: #0369a1;
      font-weight: 700;
      font-size: 15px;
    }

    .cell-marginal {
      background: #fef3c7;
      border: 1px solid #fde68a;
      color: #b45309;
      font-weight: 700;
      font-size: 15px;
    }

    .cell-grand {
      background: #d1fae5;
      border: 1px solid #a7f3d0;
      color: #047857;
      font-weight: 800;
      font-size: 16px;
    }

    /* Interactive spotlight modes */
    .mode-joint .cell-marginal, .mode-joint .cell-grand { opacity: 0.25; }
    .mode-marginal .cell-joint, .mode-marginal .cell-grand { opacity: 0.25; }
    .mode-grand .cell-joint, .mode-grand .cell-marginal { opacity: 0.25; }

    .mode-joint .cell-joint { box-shadow: 0 0 0 2px #0284c7; }
    .mode-marginal .cell-marginal { box-shadow: 0 0 0 2px #d97706; }
    .mode-grand .cell-grand { box-shadow: 0 0 0 2px #059669; }

    .callout-box {
      margin-top: 10px;
      padding: 8px 12px;
      border-radius: 8px;
      font-size: 13px;
      font-weight: 600;
      text-align: center;
      min-height: 38px;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid transparent;
      transition: all 0.2s ease;
    }

    .callout-all { background: #f8fafc; border-color: #e2e8f0; color: #334155; }
    .callout-joint { background: #f0f9ff; border-color: #bae6fd; color: #0369a1; }
    .callout-marginal { background: #fffbeb; border-color: #fde68a; color: #b45309; }
    .callout-grand { background: #ecfdf5; border-color: #a7f3d0; color: #047857; }
  </style>
</head>
<body>

  <div class="toolbar">
    <button class="btn active-all" id="btn-all" onclick="setMode('all')">All Parts</button>
    <button class="btn" id="btn-joint" onclick="setMode('joint')">Joint Frequencies</button>
    <button class="btn" id="btn-marginal" onclick="setMode('marginal')">Marginal Totals</button>
    <button class="btn" id="btn-grand" onclick="setMode('grand')">Grand Total</button>
  </div>

  <div class="table-container" id="gridContainer">
    <table>
      <thead>
        <tr>
          <th style="width: 25%;"></th>
          <th class="var-head" style="width: 25%;">Plays<br>Instrument</th>
          <th class="var-head" style="width: 25%;">No<br>Instrument</th>
          <th class="var-head" style="width: 25%;">Total</th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <th class="var-head">Plays<br>Sport</th>
          <td class="cell-joint">18</td>
          <td class="cell-joint">14</td>
          <td class="cell-marginal">32</td>
        </tr>
        <tr>
          <th class="var-head">No<br>Sport</th>
          <td class="cell-joint">12</td>
          <td class="cell-joint">16</td>
          <td class="cell-marginal">28</td>
        </tr>
        <tr>
          <th class="var-head">Total</th>
          <td class="cell-marginal">30</td>
          <td class="cell-marginal">30</td>
          <td class="cell-grand">60</td>
        </tr>
      </tbody>
    </table>

    <div class="callout-box callout-all" id="calloutText">
      Tap any button above to explore table regions.
    </div>
  </div>

  <script>
    const descriptions = {
      all: { text: "Tap any category to highlight its role.", cls: "callout-all", btnCls: "active-all" },
      joint: { text: "Joint Frequencies: Intersection of 2 traits (inner 4 cells)", cls: "callout-joint", btnCls: "active-joint" },
      marginal: { text: "Marginal Frequencies: Row and column totals", cls: "callout-marginal", btnCls: "active-marginal" },
      grand: { text: "Grand Total: Total classmates surveyed (60)", cls: "callout-grand", btnCls: "active-grand" }
    };

    function setMode(mode) {
      const container = document.getElementById('gridContainer');
      const callout = document.getElementById('calloutText');
      const buttons = document.querySelectorAll('.btn');

      // Reset mode classes on container
      container.className = 'table-container' + (mode === 'all' ? '' : ' mode-' + mode);

      // Reset buttons
      buttons.forEach(btn => {
        btn.className = 'btn';
      });

      const activeBtn = document.getElementById('btn-' + mode);
      if (activeBtn) {
        activeBtn.classList.add(descriptions[mode].btnCls);
      }

      // Update callout text & style
      callout.className = 'callout-box ' + descriptions[mode].cls;
      callout.textContent = descriptions[mode].text;
    }
  </script>
</body>
</html>

OGM.9.SP.4

Aligned learning resources

Related diagrams