When do you use the Standard Error in Confidence intervals vs, just multiplying with Standard Dev? I am confused on this part.
understand what a standard error is, then the rest will follow easily.
knowing that the standard error is a standard deviation of the sample means does not help…
Could you give an example question where they use the Stdev and not the StError?
there was a question on mock 1…forgot which, but it was somewhere early in the quant section. they gave mean and std dev but not the n, and asked for the confidence interval
http://www.analystforum.com/phorums/read.php?11,872993 hope this helps