Error is also known as?
A. Common variance
B. Unique variance
C. Random variance
D. None of the above
Answer: C
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A random sample of five elementary schools is surveyed by sending trained people to interview the teachers in these schools. This is an example of
a. simple random sampling. c. cluster sampling. b. stratified sampling. d. quota sampling.
During the nineteenth century the U.S. Supreme Court
a. heard only seven cases related to education. b. played an activist role in advancing students' and teachers' rights. c. ruled on the landmark Brown v. Board of Education case. d. approved the use of tax money to support public schools.
Which of the following examples demonstrates a stereotypic behavior?
A. Despite the fact that Dad kept calling her, Isabella continued walking as if she did not hear him. B. When Lucas said, “You want a cookie?”, it actually meant he wanted a cookie. C. When Mom pointed to the new toy, Mason looked at the movement of her mouth. D. When waiting for bus to arrive, Ava flapped her hands and spun around.
For a study that included 3 groups, the critical value for 
= .05 would be ______.
a. 3.841 b. 5.991 c. 7.815 d. 9.210