title: How to find confidence interval from the simulation of linear model
body: <p>I have used the arm package, sim() function,  to create a simulation of linear model. The simulation result contains the coefficients and residual error. I would like to find the 95% confidence interval for the coefficients. How do I find it?</p>
  <p>The codes I have used to run the simulation are provided below.</p>
  <pre><code>mod &lt;- lm(y ~ normal_dist + uniform_dist)
  sims &lt;- arm::sim(mod, n = 1000)
  
  </code></pre>