10-24-07 - Distribution of the Sample Mean X The central...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
_ Distribution of the Sample Mean X: The central Limit Theorem  = 55g  μ should be close to The size of every sample is n=5 Take a sample at 11 th  hour The size of every sample is N=5 _ X = 54g Is there a sampling error? Manufacturing problem? The Z scores and the empirical rule: True Mean: o If 54g is more than 3 σ o A Z-Score like this occurs less than 1% of the time.       _      _ Z = X –   X μ          σx(bar)    _  X = average of all possibilities μ   _ _ σX = standard deviation of X
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/18/2008 for the course ECON 205 taught by Professor Diagne during the Fall '07 term at Towson.

Ask a homework question - tutors are online