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