Change checkbox depending on value in data global attribute

I am trying to change/disable checkbox based on the 'data-count' global attribute set in the 'td' on right of the checkbox.

data-count = 0 -> checkbox should be disabled data-count > 0 -> checkbox should be checked

                        $('td.day').each(function() {                   
                                        // set checkbox disable
                                if ($(this).attr('data-count') == 0) {
                                        
                                }else{
                                        // set checkbox checked

                                }
                        });     

<script src="http://ift.tt/1oMJErh"></script>
<div>
                        <table id="mytable">
                          <thead>
                                <th>&nbsp;</th>
                                <th>Col1</th>
                                <th>&nbsp;</th>
                                <th>Col2</th>
                          </thead>
                          
                          <tbody>
                                <tr id="rw1">
                                  <td><input type="checkbox" name="check" /></td>
                                  <td class="day data-count="0">10</td>
                                  <td><input type="checkbox" name="check" /></td>
                                  <td class="day data-count="2">11</td>  
                                </tr>
                                <tr id="rw2">
                                  <td><input type="checkbox" name="check" /></td>
                                  <td class="day data-count="1"">20</td>
                                  <td><input type="checkbox" name="check" /></td>
                                  <td class="day data-count="0">21</td>
                                </tr>
                                </tbody>
                        </table>
                </div>

Regards, Elio Fernandes