An analysis of variance (ANOVA) is used
A) When random sampling is not possible.
B) To compare the means of two or more groups.
C) When the dependent measures yield nominal data.
D) When the experimental and control group do not vary.
Answer: B
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Which of the following is true?
A) Medieval Christianity, whatever its abstract notions, was primarily an empirical and scientific social movement. B) Medieval Christianity preserved and even enhanced empirical science. C) Medieval Christianity totally rejected all empirical science. D) The suppression of Galileo's discoveries is an example of the medieval Christian's complete suppression of science.
Poor poll showings, especially early in the campaign __________
A) are very rarely a self-fulfilling prophecy of defeat some candidates B) discourage the media from covering the data they accrue C) are a self-fulfilling prophecy of defeat some candidates D) often encourage voters to turnout to ensure their candidate pulls out the win