A confounding variable is problematic for an experimental design because it
What will be an ideal response?
makes possible alternative explanations for the results
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Marion needs to lose 20 pounds for her health. She will have the most success in the long run with the least health risks if she
a. has a gastric bypass or gastric band surgery. b. decreases food intake and moderately steps up exercise. c. sharply reduces food consumption. d. sharply increases her exercise.
Robinson was always well fed. At age three, he and his family were shipwrecked, and for weeks, he suffered malnutrition. After being rescued, Robinson probably
a. failed to recover and soon died. b. developed symptoms of kwashiorkor. c. had catch-up growth and then developed normally. d. continued for life to suffer symptoms of malnutrition.
When substantial sex differences are found between girls and boys, a. boys and girls typically show different patterns of behaviors. b. boys are usually found to be superior.c girls are usually fund to be superior
c. different patterns are sometimes found but do not seem to be significant.
Infertility rates, according to the text, have remained constant over the past one hundred years at the rate of ___
1-5% 10-15% 20-25% 30-25%