Do children diagnosed with attention deficit/hyperactivity disorder (ADHD) have smaller brains than children with-out this condition? This

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Do children diagnosed with attention deficit/hyperactivity disorder (ADHD) have smaller brains than children with-out this condition? This question was the topic of a research study described in the paper €œDevelopmental Trajectories of Brain Volume Abnormalities in Children and Adolescents with Attention Deficit/Hyperactivity Disorder€ (Journal of the American Medical Association [2002]: 1740€“1747). Brain scans were completed for a representative sample of 152 children with ADHD and a representative sample of 139 children without ADHD. Summary values for total cerebral volume (in cubic milliliters) are given in the following table:
Do children diagnosed with attention deficit/hyperactivity disorder (ADHD) have smaller

Is there convincing evidence that the mean brain volume for children with ADHD is smaller than the mean for children without ADHD? Test the relevant hypotheses using a 0.05 level of significance.

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