Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Standard error

  1. Nov 12, 2008 #1
    Hello my hard rocking amigos!:smile:
    I have a question about standard error.
    If I had a single sample, I could infer the population mean by using the sample standard deviation (n-1 version of s.d.), and then dividing this by the square root of the sample size to get the standard error, which can be used to determine how likely the actual population mean falls within a certain 'range' of the sample mean (using confidence intervals).
    I was hoping someone could expand on HOW the SE works. Is it just 'guessing' the standard deviation of the population based on a normal distribution? I really need to get this so any help appreciated.
    I may well have more questions concering the SE if I can just establish this point!
    Thanks as always!!!
    Last edited: Nov 12, 2008
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted