title: How to generate random numbers from a normal distribution with specific mean and variance?
body: <p>I need to generate a Gaussian random sample of <code>n</code> numbers, with mean 0 and variance 1, using the <code>randn</code> function.</p>
  
  <p>In general, how would I generate a Gaussian random sample <code>X</code> of <code>n</code> numbers, with mean <code>mu</code> and variance <code>v</code>, using the <code>randn</code> function?</p>