Which of the following correlation coefficients indicates the strongest association between two variables?
a. -0.74
b. -0.15
c. +0.26
d. +0.62
Answer: a.
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Sara allows her dog, Isabel, to run freely at a local park. When a truck drives by and its engine backfires loudly, Isabel quickly jumps up on her hind legs and barks loudly. Isabel’s response illustrates ____
a. an instinct b. operant conditioning c. sensitization d. a reflex
In _____ _____, the person is suddenly unable to recall important personal information and the loss cannot be attributed to a physical cause
Fill in the blank(s) with correct word
Which of the following techniques is used sparingly because there is a slight but genuine risk of miscarriage or damage to the fetus; however, it has a 99% accuracy in diagnosing genetic problems?
a. CT scan b. ultrasound c. amniocentesis d. chorionic villus sampling
By the end of high school, about how many of American adolescents will have had sexual intercourse?
a. one-quarter c. one-half b. one-third d. two-thirds