338 Words2 Pages

Week Three Quiz
In classical hypothesis testing, the test statistic is to the critical value what the ____________________________________.
A. p-value is to alpha. B. critical value is to alpha. C. test statistic is to the p-value. D. level of significance is to the test statistic.
You performed a right tailed hypothesis test and your sample gave you a test statistic in the left tail. Which of the following is considered the appropriate next step in this hypothesis test?
A. Fail to reject the null. B. Change the direction of the hypotheses. C. Change the level of significance of your test. D. Change the sample and do the test again.
For a two-tailed test, we split the α risk and put α/2 in each tail.
A. True B. False
The F test assumes that the sampled populations are not normal.
A. True B. False
The F test for equality of two variances tests whether the ratio of the sample variances differ significantly from 1.
A. True B. False
The p-value of .05 indicates that if Ho were true, a sample result as extreme as the one calculated would happen by chance approximately 5 times out of 1000.
A. True B. False
For dependent samples, we assume the distribution of the paired differences between the populations has a mean greater than 0.
A. True B. False
For independent populations, the standard deviation of the distribution of the differences has a variance equal to the sum of the two individual variances.
A. True B. False
To ensure that two independent samples are large enough that the distribution of the sample means follow a normal distribution, the practice is to require that both samples have at least 30 observations.
A. True B. False
When comparing two

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