Chapter3.ipynb

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      "source": [
        "#<div dir=\"rtl\" align=center>3.1 Dispersion center indices</div>\n"
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "rEEPXA_xceKh"
      },
      "source": [
        "import pandas as pd\n"
      ],
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      "outputs": []
    },
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      "source": [
        "flying_mice_song_lengths = [3.12, 3.52, 3.4, 2.78, 3.68, 7.62]\n",
        "sum(flying_mice_song_lengths)/len(flying_mice_song_lengths)"
      ],
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "4.0200000000000005"
            ]
          },
          "metadata": {},
          "execution_count": 2
        }
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      "source": [
        "dana_playlist_song_lengths = pd.Series([3.12, 3.52, 3.4, 2.78, 3.68, 7.62])\n",
        "dana_playlist_song_lengths.mean()"
      ],
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "4.0200000000000005"
            ]
          },
          "metadata": {},
          "execution_count": 3
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      "source": [
        "dana_playlist_song_lengths.median()"
      ],
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "3.46"
            ]
          },
          "metadata": {},
          "execution_count": 4
        }
      ]
    },
    {
      "cell_type": "code",
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        "id": "GXFkKabPcnT-"
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      "source": [
        "new_playlist_song_lengths = pd.Series([4.42, 3.52, 3.4, 2.78, 5.8, 4.47])"
      ],
      "execution_count": null,
      "outputs": []
    },
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      "source": [
        "new_playlist_song_lengths.median()"
      ],
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      "outputs": [
        {
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          "data": {
            "text/plain": [
              "3.9699999999999998"
            ]
          },
          "metadata": {},
          "execution_count": 6
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      "source": [
        "new_playlist_song_lengths.mean()"
      ],
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "4.0649999999999995"
            ]
          },
          "metadata": {},
          "execution_count": 7
        }
      ]
    },
    {
      "cell_type": "code",
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        "id": "L-vQbcVsdaDT"
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      "source": [
        "old_playlist_song_lengths = pd.Series([4.3, 4.51, 3.87, 3.92, 4.17, 3.41])"
      ],
      "execution_count": null,
      "outputs": []
    },
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        "old_playlist_song_lengths.mean()"
      ],
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            "text/plain": [
              "4.03"
            ]
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          "execution_count": 9
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        "old_playlist_song_lengths.median()"
      ],
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      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "4.045"
            ]
          },
          "metadata": {},
          "execution_count": 10
        }
      ]
    },
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      "cell_type": "code",
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      "source": [
        "old_playlist_song_lengths.max() - old_playlist_song_lengths.min()"
      ],
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "1.0999999999999996"
            ]
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          "metadata": {},
          "execution_count": 11
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      "source": [
        "new_playlist_song_lengths.max() - new_playlist_song_lengths.min()"
      ],
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "3.02"
            ]
          },
          "metadata": {},
          "execution_count": 12
        }
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      "source": [
        "old_playlist_song_lengths.std()"
      ],
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        {
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          "data": {
            "text/plain": [
              "0.3860051813123755"
            ]
          },
          "metadata": {},
          "execution_count": 13
        }
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      "source": [
        "new_playlist_song_lengths.std()"
      ],
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "1.0668411315655204"
            ]
          },
          "metadata": {},
          "execution_count": 14
        }
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    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "aL0bZeAKfc98"
      },
      "source": [
        "#<div dir=\"rtl\" align=center>3.2 Categorical data and prevalence rates</div>"
      ]
    },
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      "cell_type": "code",
      "metadata": {
        "id": "AZK1Wkg8fMeD"
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      "source": [
        "flying_mice_genres = pd.Series(['rock', 'jazz', 'rock', 'pop', 'pop', 'rock', 'pop', 'rock', 'pop', \n",
        "                      'rock', 'rock', 'rock', 'rock', 'pop', 'rock', 'pop', 'rock', 'rock', \n",
        "                      'jazz', 'rock', 'rock', 'rock', 'rock', 'pop', 'pop', 'rock', 'rock',\n",
        "                      'pop', 'rock'])\n"
      ],
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "D1x-hnhgh39S"
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      "source": [
        "children_of_the_moon_genres = pd.Series(['pop', 'jazz', 'pop', 'jazz', 'rock', 'pop', 'rock', 'pop', 'pop',\n",
        "                                  'pop', 'jazz', 'rock', 'pop', 'rock', 'rock', 'rock', 'rock', 'pop', \n",
        "                                  'rock', 'jazz', 'pop', 'rock', 'rock', 'pop', 'rock', 'rock', 'pop',\n",
        "                                  'pop', 'rock', 'rock', 'rock', 'jazz', 'jazz', 'jazz', 'pop', 'rock', \n",
        "                                  'jazz', 'rock', 'rock', 'rock', 'jazz', 'rock', 'pop', 'rock', 'rock'])"
      ],
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      "outputs": []
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      "source": [
        "flying_mice_genres.value_counts()"
      ],
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "rock    18\n",
              "pop      9\n",
              "jazz     2\n",
              "dtype: int64"
            ]
          },
          "metadata": {},
          "execution_count": 17
        }
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      "source": [
        "children_of_the_moon_genres.value_counts()"
      ],
      "execution_count": null,
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        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "rock    22\n",
              "pop     14\n",
              "jazz     9\n",
              "dtype: int64"
            ]
          },
          "metadata": {},
          "execution_count": 18
        }
      ]
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      "source": [
        "children_of_the_moon_genres.value_counts(normalize=True)"
      ],
      "execution_count": null,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "rock    0.488889\n",
              "pop     0.311111\n",
              "jazz    0.200000\n",
              "dtype: float64"
            ]
          },
          "metadata": {},
          "execution_count": 19
        }
      ]
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}