The rate of births to teen mothers is __________.
A. higher in the United States than in most developed nations
B. sharply increasing in the United States
C. the lowest in the world in the United States
D. slowly increasing in the United States
Answer: A
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When variables A and B are independent, the variance of A - B is equal to
a. the variance of A plus the variance of B. b. the variance of A. c. variance of A minus the variance of B. d. it cannot be determined from the information given here.
The branch of statistics that allows researchers to test their hypotheses is called ____ statistics
a. causal b. descriptive c. inferential d. deductive
The fastest neurons can send impulses at about miles per hour. a. 200
b. 425 c. 150 d. 45
Autism spectrum disorders are more common in
A. children affected by ADHD. B. girls. C. boys. D. the educationally blind.