Refer to the following paragraph to answer the questions below.
Jack Short and Sharon Tall want to increase the percentage of high-school freshmen who pass an algebra exam (dependent variable) . They conduct experiments on five sets of classes (named A to E) in Chicago-area schools. They randomly assign students and give a pretest in September followed by a posttest in January. The treatment is the teaching method. The experimental groups are taught with special in-class demonstrations and pictorial games-quizzes on computers, but no homework assignments, textbooks, or tests. The control groups are taught in the traditional way with a textbook, homework assignments, formulas on the blackboard, and tests.

-Looking at all five sets, which set of classes appears to be made up of a nonrandom sample of students from the Chicago-area schools?
A) A
B) B
C) C
D) D
E) E
Correct Answer:
Verified
Q18: The Vice President for Human Relations at
Q19: What experimental design did she use?
A) classical
Q20: During the course of her experiment, Yolanda
Q21: Timothy got a job working for a
Q22: George used the
Q24: Talk about:
-control group
Q25: Talk about:
-debrief
Q26: Talk about:
-deception
Q27: Talk about:
-demand characteristics
Q28: Talk about:
-design notation
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