Suppose a researcher is interested in the effectiveness of a new treatment method to decrease systolic...
Suppose a researcher is interested in the effectiveness of a new treatment method to decrease systolic blood pressure in patients with hypertension. Assume the researcher uses an estimated pooled standard error of 21.3 mmHG, and wants to set the desired power to 90%. If the margin of error is going to be set to 20 mmHG, how many individuals should be sampled to reach 95% confidence?
A. 23
B.19.84~20
C. 23.84~24
D. 21
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Suppose a researcher is interested in the effectiveness of a new
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