_1 = 75,
      Cluster_2 = 150,
      Cluster_3 = 75,
      Cluster_4 = 75,
      Cluster_5 = 125))
  </code></p></dd>


<dt>popsize</dt>
<dd><p>Object that provides values for the population argument of the
  <code>calibrate</code> or <code>postStratify</code> functions in the survey package. If
  a value is provided for popsize, then either the <code>calibrate</code> or
  <code>postStratify</code> function is used to modify the survey design object
  that is required by functions in the survey package.  W