A Pediatrician Is Interested in Determining If Cognitive Development Scores

question 11

Short Answer

A pediatrician is interested in determining if cognitive development scores are lower for low-birthweight infants than normal infants. She has 49 active cases involving low-birthweight infants from who she could collect data to compare to the national average. What would power be assuming the following effect sizes and α = .05?
a.
=.20
b.
=.50
c.
=.80

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Definitions:

Coronary Sulcus

A groove on the surface of the heart marking the division between the ventricles and the atria.

Anterior Interventricular Sulcus

A groove on the heart's surface that marks the boundary between the left and right ventricles and contains blood vessels that supply the heart muscle.

Papillary Muscles

Muscles located in the ventricles of the heart that attach to the cusps of the atrioventricular valves via the chordae tendineae and help prevent valve inversion.

Apex

The top or highest part of something, often pointed; used in various anatomical contexts.