title: How to use norm.ppf() to find z values?
body: <p>I am new to python and I don't understand how to use the norm.ppf function to answer this question, can someone help me please?</p>
  <p>Our professor gave us this line to help answer the homework:</p>
  <pre><code>import scipy.stats as stats
  print(stats.norm.ppf( q=0.5-0.341, loc=0, scale=1))
  </code></pre>
  <p>The question asks about El Nino data in a standard normal distribution:
  What ENSO index ε gives Pr(Z &gt;= ε) = 0.1?</p>
  <p>I'm completely baffled, how can I edit this code to answer the question?</p>