fork_and_collider.ipynb

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    "size = 1000\n",
    "y = np.random.normal(size=size)\n",
    "x = y + np.random.normal(size=size)\n",
    "z = y + np.random.normal(size=size)\n",
    "X_fork = pd.DataFrame({'x': x, 'y': y, 'z': z})\n",
    "\n",
    "x = np.random.normal(size=size)\n",
    "z = np.random.normal(size=size)\n",
    "y = x + z + np.random.normal(size=size)\n",
    "X_collider = pd.DataFrame({'x': x, 'y': y, 'z': z})"
   ]
  }
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