Homework Help: Statistic

Posted by Cookie on Friday, February 1, 2013 at 10:58pm.

For a population with a mean of μ 70 and a standard
deviation of 20, how much error, on average,
would you expect between the sample mean (M) and
the population mean for each of the following sample
sizes?
a. n 4 scores
b. n 16 scores
c. n 25 scores

Statistic - PsyDAG, Saturday, February 2, 2013 at 11:15am
Z = (score-mean)/SEm

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z scores.

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