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    <tr style="text-align: right;">
      <th></th>
      <th>Unnamed: 0</th>
      <th>Teachers quality</th>
      <th>Unnamed: 2</th>
      <th>Unnamed: 3</th>
      <th>Unnamed: 4</th>
      <th>Unnamed: 5</th>
      <th>Unnamed: 6</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th>0</th>
      <td>treatment</td>
      <td>Sch A</td>
      <td>Sch B</td>
      <td>Sch C</td>
      <td>Sch D</td>
      <td>Sch E</td>
      <td>Sch F</td>
    </tr>
    <tr>
      <th>1</th>
      <td>Good</td>
      <td>9</td>
      <td>2</td>
      <td>12</td>
      <td>6</td>
      <td>6</td>
      <td>11</td>
    </tr>
    <tr>
      <th>2</th>
      <td>Good</td>
      <td>8</td>
      <td>0</td>
      <td>6</td>
      <td>9</td>
      <td>5</td>
      <td>6</td>
    </tr>
    <tr>
      <th>3</th>
      <td>Good</td>
      <td>7</td>
      <td>3</td>
      <td>3</td>
      <td>10</td>
      <td>4</td>
      <td>8</td>
    </tr>
    <tr>
      <th>4</th>
      <td>Good</td>
      <td>12</td>
      <td>3</td>
      <td>6</td>
      <td>7</td>
      <td>4</td>
      <td>6</td>
    </tr>
    <tr>
      <th>5</th>
      <td>Good</td>
      <td>11</td>
      <td>2</td>
      <td>3</td>
      <td>4</td>
      <td>4</td>
      <td>4</td>
    </tr>
    <tr>
      <th>6</th>
      <td>Average</td>
      <td>9</td>
      <td>6</td>
      <td>4</td>
      <td>5</td>
      <td>12</td>
      <td>7</td>
    </tr>
    <tr>
      <th>7</th>
      <td>Average</td>
      <td>6</td>
      <td>2</td>
      <td>8</td>
      <td>5</td>
      <td>10</td>
      <td>9</td>
    </tr>
    <tr>
      <th>8</th>
      <td>Average</td>
      <td>0</td>
      <td>2</td>
      <td>6</td>
      <td>4</td>
      <td>7</td>
      <td>3</td>
    </tr>
    <tr>
      <th>9</th>
      <td>Average</td>
      <td>5</td>
      <td>6</td>
      <td>6</td>
      <td>6</td>
      <td>12</td>
      <td>7</td>
    </tr>
    <tr>
      <th>10</th>
      <td>Average</td>
      <td>2</td>
      <td>3</td>
      <td>7</td>
      <td>9</td>
      <td>9</td>
      <td>9</td>
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    <tr>
      <th>11</th>
      <td>Bad</td>
      <td>0</td>
      <td>12</td>
      <td>3</td>
      <td>4</td>
      <td>2</td>
      <td>3</td>
    </tr>
    <tr>
      <th>12</th>
      <td>Bad</td>
      <td>0</td>
      <td>12</td>
      <td>2</td>
      <td>0</td>
      <td>0</td>
      <td>1</td>
    </tr>
    <tr>
      <th>13</th>
      <td>Bad</td>
      <td>0</td>
      <td>7</td>
      <td>3</td>
      <td>0</td>
      <td>2</td>
      <td>2</td>
    </tr>
    <tr>
      <th>14</th>
      <td>Bad</td>
      <td>0</td>
      <td>9</td>
      <td>5</td>
      <td>3</td>
      <td>0</td>
      <td>4</td>
    </tr>
    <tr>
      <th>15</th>
      <td>Bad</td>
      <td>0</td>
      <td>8</td>
      <td>3</td>
      <td>0</td>
      <td>0</td>
      <td>0</td>
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  </tbody>
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   Unnamed: 0 Teachers quality Unnamed: 2 Unnamed: 3 Unnamed: 4 Unnamed: 5  \
0   treatment            Sch A      Sch B      Sch C      Sch D      Sch E   
1       Good                 9          2         12          6          6   
2       Good                 8          0          6          9          5   
3       Good                 7          3          3         10          4   
4       Good                12          3          6          7          4   
5       Good                11          2          3          4          4   
6     Average                9          6          4          5         12   
7     Average                6          2          8          5         10   
8     Average                0          2          6          4          7   
9     Average                5          6          6          6         12   
10    Average                2          3          7          9          9   
11        Bad                0         12          3          4          2   
12        Bad                0         12          2          0          0   
13        Bad                0          7          3          0          2   
14        Bad                0          9          5          3          0   
15        Bad                0          8          3          0          0   

   Unnamed: 6  
0       Sch F  
1          11  
2           6  
3           8  
4           6  
5           4  
6           7  
7           9  
8           3  
9           7  
10          9  
11          3  
12          1  
13          2  
14          4  
15          0  

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      <th></th>
      <th>Quality Rating</th>
      <th>Sch A</th>
      <th>Sch B</th>
      <th>Sch C</th>
      <th>Sch D</th>
      <th>Sch E</th>
      <th>Sch F</th>
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  </thead>
  <tbody>
    <tr>
      <th>0</th>
      <td>Good</td>
      <td>9</td>
      <td>2</td>
      <td>12</td>
      <td>6</td>
      <td>6</td>
      <td>11</td>
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    <tr>
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      <td>Good</td>
      <td>8</td>
      <td>0</td>
      <td>6</td>
      <td>9</td>
      <td>5</td>
      <td>6</td>
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      <th>2</th>
      <td>Good</td>
      <td>7</td>
      <td>3</td>
      <td>3</td>
      <td>10</td>
      <td>4</td>
      <td>8</td>
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    <tr>
      <th>3</th>
      <td>Good</td>
      <td>12</td>
      <td>3</td>
      <td>6</td>
      <td>7</td>
      <td>4</td>
      <td>6</td>
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    <tr>
      <th>4</th>
      <td>Good</td>
      <td>11</td>
      <td>2</td>
      <td>3</td>
      <td>4</td>
      <td>4</td>
      <td>4</td>
    </tr>
  </tbody>
</table>
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  Quality Rating  Sch A  Sch B  Sch C  Sch D  Sch E  Sch F
0          Good       9      2     12      6      6     11
1          Good       8      0      6      9      5      6
2          Good       7      3      3     10      4      8
3          Good      12      3      6      7      4      6
4          Good      11      2      3      4      4      4

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Notebook

Distribution of teacher quality ratings?