MythosHF

I'm not very good in statistics, but as far as I know, you have to use standard error when need to calculate the value of population mean from known sample mean. Here you have population mean and you're asked to find interval in which particular percent of all values lie. If you were given sample mean and were asked find interval in which population mean lies, you would be using standard error. It's a bit tricky, but I hope you'll get it.



Edited 1 time(s). Last edit at Monday, May 16, 2011 at 07:43AM by optiix.