lass="nv">on</span><span class="w"> </span><span class="nv">a</span><span class="w"> </span><span class="nv">series</span><span class="w"> </span><span class="nv">of</span><span class="w"> </span><span class="nv">observations</span><span class="w"> </span><span class="nv">obtained</span><span class="w"> </span><span class="nv">by</span>
<span class="nv">sampling</span><span class="w"> </span><span class="nv">from</span><span class="w"> </span><span class="nv">a</span><span class="w"> </span><span class="nv"