Why is a Pearson’s r of .6 more than twice as useful as a Pearson’s r of .3?
What will be an ideal response?
ANS: The coefficient of determination for r = .6 shows that the variables have 36 percent of their variance in common; when r = .3, the variables have 9 percent of their variance in common. The r=.6 would be more useful for prediction.
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Discuss the causes of intellectual disabilities
What will be an ideal response?
Advocates of mastery learning believe that this approach
a. can help foster all students' perseverance if time allotted for learning, teaching methods, and assessment techniques are appropriate. b. should be restricted to those students who have sufficient aptitude for the subject matter. c. can compensate for a student's lack of prerequisite knowledge and skills. d. is appropriate for vaguely defined learning objectives.
A parent tells you that the bruises on one of the children in your class were caused by a fall. Which of the following signs might indicate that the cause of the bruises was physical abuse rather than a fall?
a. The injuries are on one plane of the body (for instance, around the head or around the midsection). b. There are no signs of injury on the hands, knees, or forehead. c. The child’s injuries are at the same stage of healing. d. All of these answers.
The value of b1 and b2 are referred to as ______.
A. unstandardized beta coefficients B. standardized beta coefficients C. regression variation D. residual variation