Dr. Harriet found a fossil in the desert. Back at her lab, she had a very difficult time determining if it was primate or hominid in origin. This is because the fossil probably dated back ________ years
a. 1 million
b. 2 million
c. 6 million
d. 10 million
C. The hominid line that led to humans split from the primate line approximately 6 million years ago.
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Piaget called his first stage of cognitive development the "sensorimotor" stage because young infants
A) can engage in some representational thought but without the use of symbols. B) make a conscious choice to engage directly with their environment rather than use symbolic thought. C) cannot engage in the processes of organization, assimilation and accommodation. D) learn about the world of "here and now" through their sensory and motor actions alone.
The closer a given z score is to 0, then the closer it is
a. to the tails of the curve b. to the mean of the distribution c. to the 68th percentile d. to a 0% frequency