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   "source": [
    "# E7. To be completed after lesson 21\n",
    "\n",
    "<hr />"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercise 7.1\n",
    "\n",
    "Explain why it is useful to have your data in tidy format in the context of hierarchical modeling."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<br/>"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercise 7.2\n",
    "\n",
    "Have you encountered a set of experiments that have a hierarchical structure in your own work? If so, can you please briefly describe the situation?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<br />"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercise 7.3\n",
    "\n",
    "What is exchangeability?"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<br />"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercise 7.4\n",
    "\n",
    "Describe why thoroughly checking MCMC diagnostics is especially important when working with hierarchical models."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<br/>"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exercise 7.5\n",
    "\n",
    "Write down any additional questions you have."
   ]
  }
 ],
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