When the correlation between X and Y equals zero, the standard error of

Sara is high in the personality trait that best predicts who will live the longest. Which one is it?

a. extraversion b. openness to experience c. agreeableness d. conscientiousness

Seven-year-old George, who possesses average academic ability, is a problematic student. He continuously disrupts the classroom decorum and talks to other children while they are working. He shows no interest in activities that require his attention for a length of time and usually acts on his impulses. In this scenario, George is most likely suffering from ____

A) autism B) dyslexia C) Asperger's disorder D) attention-deficit/hyperactivity disorder