1 3 2 Confounding Variables
11 years ago
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[{"text":"Example A study that appeared in the American "},{"text":"Journal","bold":true},{"text":" of Cardiology (March 15, 2003) found that heart attack survivors who\u00a0..."}]
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{"title":"1 3 2 Confounding Variables by R Backman 38,933 views 11 years ago 3 minutes, 13 seconds","duration":"3 minutes, 13 seconds"}