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Systolic blood pressure in healthy adults is normally distributed with mean 112 mmHg and standard deviation 10 mmHg. You take ten healthy adult patient blood

Systolic blood pressure in healthy adults is normally distributed with mean 112 mmHg and standard deviation 10 mmHg. You take ten healthy adult patient blood pressure readings and find that the average is 110 mmHg. The Z-score corresponding to this average is . The sample mean is because it is

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