title: Adding lines for mean and CI to graph
body: <p>Completely new to JMP, this seems like a really simple question but google has been 0 help.</p>
  <p>I have a simple line graph Y vs X and I just want to display a horizontal line for the mean value of Y, as well as 2 additional lines (and perhaps a shaded region) for the upper and lower bounds of the 95% confidence interval for Y.</p>
  <p>I would also like to know how to connect the lines of my scatterplot.  I tried making it a line plot instead but the line plot would not show my individual points, just a line, so if anyone could enlighten me on how to make the line plot show points I would appreciate it,</p>
  <p>Sorry for what's probably a stupid question,  any help greatly appreciated.</p>