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1. True or False. Pitfalls to consider in a statistical test include nonrandom samples, small sample size, and lack of causal links. 2. Because 25

1. True or False. Pitfalls to consider in a statistical test include nonrandom samples, small sample size, and lack of causal links.

2. Because 25 percent of the students in my morning statistics class watch eight or more hours of television a week, I conclude that 25 percent of all students at the university watch eight or more hours of television a week. The most important logical weakness of this conclusion would be:

a. relying on any sample instead of surveying every student.

b. failing to correct for unconscious interviewer bias.

c. using a sample that may not be representative of all students.

d. assuming cause and effect where none exists.

3. Surveying electric vehicle owners would provide a representative random sample of Americans' views on global warming policies. True False

4. In hypothesis testing, we are trying to prove the null hypothesis. True False

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