Q1. A goal of an “innocent until proven guilty” justice system is to place a higher priority on: A) avoiding type I errors. B) avoiding type II errors. C) the null hypothesis.
Q2. If the null hypothesis is innocence, then the statement “It is better that the guilty go free, than the innocent are punished” is an example of preferring a:
A) type II error over a type I error. B) higher level of significance. C) type I error over a type II error.
Q3. A bottler of iced tea wishes to ensure that an average of 16 ounces of tea is in each bottle. In order to analyze the accuracy of the bottling process, a random sample of 150 bottles is taken. Using a t-distributed test statistic of -1.09 and a 5% level of significance, the bottler should: A) not reject the null hypothesis and conclude that bottles contain an average 16 ounces of tea. B) not reject the null hypothesis and conclude that bottles do not contain an average of 16 ounces of tea. C) reject the null hypothesis and conclude that bottles contain an average 16 ounces of tea.
Q4. The power of the test is: A) the probability of rejecting a true null hypothesis. B) equal to the level of confidence. C) the probability of rejecting a false null hypothesis.
Q5. For a t-distributed test statistic with 30 degrees of freedom, a one-tailed test specifying the parameter greater than some value and a 95% confidence level, the critical value is: A) 1.640. B) 1.697. C) 2.042.
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发表于 2009-1-13 16:02
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