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A population of scores has a standard deviation of 5. In this population a raw score...

A population of scores has a standard deviation of 5. In this population a raw score of 45 corresponds to a z
score of 1.5. What is the population mean?

math   Statistics-And-Probability   
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Answer #1

We know that a z-score is given by: where are raw score, population mean and population standard deviation respectively.

Now,

which is the population mean.

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