Question 141 out of 1 points The sizes of four samples vary as follows Sample A

# Question 141 out of 1 points the sizes of four

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Question 14 1 out of 1 points The sizes of four samples vary as follows: Sample A, N = 100 Sample B, N = 76 Sample C, N = 1000 Sample D, N = 150 Which sample will produce the most efficient estimate? Correct Answer: Sample C Question 15 1 out of 1 points Polls tracking the presidential election of 2004 showed that Correct Answer: the race was "too close to call" during much of the campaign. Question 16 1 out of 1 points A random sample of 200 includes 100 Protestants. The researcher estimates at the 95% confidence level that between 43% and 57% of the population is Protestant. In this research situation Correct Answer: alpha is 0.05. Question 17 1 out of 1 points Based on an EPSEM sample of 300 state university students, we estimate that the average number of hours of study time each week is 30 ± 2. In this example, the population is Correct Answer: all state university students. Question 18 1 out of 1 points A random sample of 500 reports an average yearly income of \$42,000 with a standard deviation of \$1000. An estimate of the parameter at the 95% level is about \$175 wide. In this research situation
Correct Answer: the alpha level is 0.05. Question 19 1 out of 1 points Two sample statistics are unbiased estimators. They are Correct Answer: means and proportions. Question 20 1 out of 1 points The fundamental principle of probability sampling is that a sample selected by ____ is very likely to be ____. Correct Answer: EPSEM; representative

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