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A researcher compares two diet programs (Diet X vs. Diet Y) using a matched pairs design with 50 pairs of volunteers matched on age, baseline weight, and metabolism. Correlation of weight loss between matched partners: .
Compared to an independent-groups design with 50 participants per diet (100 total), the matched pairs design achieves approximately how many times the statistical power to detect an equal effect size?
A researcher compares two diet programs (Diet X vs. Diet Y) using a matched pairs design with 50 pairs of volunteers matched on age, baseline weight, and metabolism. Correlation of weight loss between matched partners: .
Compared to an independent-groups design with 50 participants per diet (100 total), the matched pairs design achieves approximately how many times the statistical power to detect an equal effect size?