Posted by Anonymous on Thursday, February 24, 2011 at 4:15pm.
If μ =10 and σ =4 for a distribution of sample mean, with n=16 for each mean, how far
above the population mean (in %) is a sample mean score of 12

statistics  PsyDAG, Friday, February 25, 2011 at 2:00pm
Z = (mean1  mean2)/standard error (SE) of difference between means
SEdiff = √(SEmean1^2 + SEmean2^2)
SEm = SD/√(n1)
If only one SD is provided, you can use just that to determine SEdiff.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score.
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