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Suppose you take a random sample of size n=45 from a normal distribution withmean 5 andstandard deviation 20 (i.e., (5,20). Based on those 45observations, you

Suppose you take a random sample of size n=45

from a normal distribution withmean 5 andstandard deviation 20 (i.e.,

(5,20). Based on those 45observations, you construct a sample mean.

If you observe a sample mean of 5.5, what is the Z-score of the sample mean?

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