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    "# Preface\n",
    "\n",
    "These notes are largely based on on the course Introduction to R by John Mushcelli and Andrew Jaffe and are shared under the [Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License](https://creativecommons.org/licenses/by-nc-sa/4.0/), and Penn State courses STAT 480-482 which is shared under the creative commons license [CC BY-NC 4.0](https://creativecommons.org/licenses/by-nc/4.0/).\n",
    "\n",
    "You can find the original course materials at:\n",
    "\n",
    "* [John Muschelli's github](https://johnmuschelli.com/intro_to_r/)\n",
    "* [Penn State Stat Online](https://online.stat.psu.edu/statprogram/)."
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