Categorical Jittered Scatter Mean Overlay

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    "information": {
      "name": "Categorical Jitter Scatter Mean Overlay",
      "description": "[No Description Provided]",
      "author": "Kerry Kolosko",
      "uuid": "ed8a7526-b721-4ddf-97a4-ac8aa5c91ac2",
      "generated": "2022-02-09T05:26:43.193Z"
    },
    "dataset": [
      {
        "key": "__0__",
        "name": "Index",
        "description": "",
        "type": "numeric",
        "kind": "column"
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      {
        "key": "__1__",
        "name": "Category",
        "description": "",
        "type": "text",
        "kind": "column"
      },
      {
        "key": "__2__",
        "name": "Value",
        "description": "",
        "type": "numeric",
        "kind": "measure"
      }
    ]
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  "data": {"name": "dataset"},
  "transform": [
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      "as": "Jitter"
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  "width": {"step": 50},
  "encoding": {
    "x": {
      "field": "__1__",
      "type": "ordinal",
      "axis": {"title": ""}
    },
    "y": {
      "field": "__2__",
      "type": "quantitative",
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      "scale": {"zero": false}
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    "color": {
      "field": "__1__",
      "type": "nominal",
      "scale": {"scheme": "plasma"},
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  "layer": [
    {
      "mark": {
        "type": "point",
        "tooltip": true,
        "filled": true,
        "size": 70,
        "opacity": 0.7
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      "encoding": {
        "xOffset": {
          "field": "Jitter",
          "type": "quantitative"
        }
      }
    },
    {
      "mark": {
        "type": "tick",
        "thickness": 2,
        "size": 30
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      "encoding": {
        "y": {
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          "aggregate": "mean"
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