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A health psychologist tests a new intervention to determine if it can change healthy behaviors among...

A health psychologist tests a new intervention to determine if it can change healthy behaviors among siblings. To conduct the this test using a matched-pairs design, the researcher gives one sibling an intervention, and the other sibling is given a control task without the intervention. The number of healthy behaviors observed in the siblings during a 5-minute observation were then recorded.

Yes:6,4,7,7,7,5

No:5,6,5,6,5,5

Compute effect size using eta-squared. (Round your answer to two decimal places.)

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