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A researcher fails to find a significant different mean blood pressure in 36 matched pairs. The standard deviation of the difference was 5 mmHg. What

A researcher fails to find a significant different mean blood pressure in 36 matched pairs. The standard deviation of the difference was 5 mmHg. What was the power of the test to find a mean difference of 2.5 mmHg at alpha = 0.05(two sided)

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