le fpc for a two-stage unstratified survey design:</p>
<p><code>fpc &lt;- c(
    Ncluster = 150,
    Cluster_1 = 150,
    Cluster_2 = 75,
    Cluster_3 = 75,
    Cluster_4 = 125,
    Cluster_5 = 75)
  </code></p>
<p>Example fpc for a two-stage stratified survey design:</p>
<p><code>fpc &lt;- list(
    Stratum_1 = c(
      Ncluster_1 = 100,
      Cluster_1 = 125,
      Cluster_2 = 100,
      Cluster_3 = 100,
      Cluster_4 = 125,
      Cluster_5 = 50),
    Stratum_2 = c(
      Ncluster_2 = 50,
      Cluster