roduction"></a>
</h2>
<p>spsurvey’s analysis functions are used to analyze data in a variety
of contexts. We focus mainly on using the <code>NLA_PNW</code> analysis
data to introduce some of these analysis functions. The
<code>NLA_PNW</code> data contains response variables measured at
several lakes in the Pacific Northwest Region (PNW) of the United
States. There are several variables in <code>NLA_PNW</code> you will use
throughout this vignette:</p>
<ul>
<li>
<code>SITE_ID</code>: a unique site identifi