servations on two variables</p><dl><dt>field</dt>
<dd><p>a factor with levels <code>Health</code>,
<code>Education</code>, <code>Foreign Language</code>, <code>Psychology</code>, <code>Fine Arts</code>,
<code>Life Sciences</code>, <code>Business</code>, <code>Social Science</code>, <code>Physical Sciences</code>,
<code>Engineering</code>, and <code>All Fields</code></p></dd>
 
<dt>awarded</dt>
<dd><p>a factor with levels <code>1970</code> and <code>1990</code></p></dd>
 

</dl></div>
    <div id="source">
 