title: Create a column such that - If `x` lies in top 150, its value is "Good". Else its value is "Bad"
body: <p>How do I create a binary column <code>performance</code> in <code>tbl</code> such that -</p>
  <p>If <code>x</code> lies in top 150 (our of 243), value of performance is &quot;Good&quot;</p>
  <p>Else, value of performance is &quot;Bad&quot;</p>
  <pre><code>tbl &lt;- tibble(x = runif(n = 243, min = 0, max = 1))
  
  </code></pre>