The life expectancy in Sub-Saharan Africa has dropped from to
a. 70; 55
b. 62; 40
c. 61; 35
d. 60; 40
C
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Dr. Shortstuff conducted an experiment to raise IQ scores by having experimental subjects eat three bananas each day for a month, while control groups had no bananas. Below are his results (scores = average IQ score for group of subjects)
Pretest Posttest Experimental Group 102 110 Control Group 80 110 Which of the following can you say about the results? A) The experiment proves that the Dr. Shortstuff's treatment works. B) The experiment has selection bias problems. C) All experimental subjects ended up the same whether or not they had the treatment. D) A and B. E) B and C.
Which of the following experimental designs is (are) capable of controlling ALL of the threats
to internal validity?
a. the Solomon four?group design b. the "classic" experimental design c. the posttest?only control group design d. all of the answers represent experimental designs that are capable of controlling all of the threats to internal validity
President Obama did not receive substantial credit for the Stimulus Plan when the midterm elections of 2010 approached for the following reasons
A) ?did not provide enough information for voters to understand it B) ?unemployment rates stayed high and gave the impression that it was not effective C) ?both a and b D) ?only a
Booker T. Washington believed that African Americans should focus on:
a) Acquiring more education b) Better work skills and habits c) Reproduction d) Increasing their agrarian influence