Box plots (also called box-and-whisker plots) summarize a distribution using five statistics: the minimum, first quartile (Q1), median, third quartile (Q3), and maximum. They are non-parametric and highly effective for comparing distributions across multiple groups, especially when outliers matter.

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class
Class A
Class B
Class C
Class D

{
  "title": {
    "text": "Test Scores by Class"
  },
  "data": [
    {
      "class": "Class A",
      "min": 48,
      "q1": 62,
      "median": 74,
      "q3": 84,
      "max": 96
    },
    {
      "class": "Class B",
      "min": 52,
      "q1": 68,
      "median": 79,
      "q3": 88,
      "max": 99
    },
    {
      "class": "Class C",
      "min": 38,
      "q1": 55,
      "median": 68,
      "q3": 80,
      "max": 94
    },
    {
      "class": "Class D",
      "min": 60,
      "q1": 72,
      "median": 82,
      "q3": 90,
      "max": 100
    }
  ],
  "series": [
    {
      "type": "boxplot",
      "xKey": "class",
      "minKey": "min",
      "q1Key": "q1",
      "medianKey": "median",
      "q3Key": "q3",
      "maxKey": "max",
      "fill": "#6366f1",
      "fillOpacity": 0.6,
      "stroke": "#4f46e5",
      "strokeWidth": 1.5
    }
  ],
  "axes": [
    {
      "position": "bottom",
      "type": "category",
      "title": {
        "text": "Class"
      }
    },
    {
      "position": "left",
      "title": {
        "text": "Score"
      }
    }
  ]
}

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Four groups showing their five-number summaries — minimum, Q1, median, Q3, and maximum.

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