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Compute a z-statistic for each of the following sample means, assuming the population has a mean of 100 and a standard deviation of 30. A

Compute a z-statistic for each of the following sample means, assuming the population has a mean of 100 and a standard deviation of 30. A sample of 32 scores has a mean of 113, a sample of 80 scores has a mean of 95 and a sample of 50 scores has a mean of 100.

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