title: unused arguments error occurs in response
body: <p>Upon runing this code,        </p>
  
  <pre><code>Attrition_edufield &lt;- myds %&gt;%
  select(Attrition, EducationField) %&gt;%
  group_by(Attrition, EducationField) %&gt;%
  summarize(count = n())
  </code></pre>
  
  <p>I get response with </p>
  
  <p><code>Error in select(., Attrition, EducationField) : 
    unused arguments (Attrition, EducationField)</code></p>
  
  <p>Any idea why this occurs?</p>