BUS 308 Week 2 Quiz - Spring 2016

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BUS 308 Week 2 Quiz - Spring 2016

1. The independent t-test is based on which distribution?
2. What statistic measures data variability in both groups in an independent t-test?
3. What is the advantage of a one-tailed test over a two-tailed test?
4. How does variability in the distribution of sample means compare to variability in a population based on individual scores?
5. The test statistic follows the formula of difference divided by variability.
6. Why do the critical values change with degrees of freedom for the t-tests?
7. Type I errors may occur with ______ results and type II errors with ______ results.
8. What is the alternate hypothesis in a problem where sales group two is predicted to be “. . . significantly less productive than sales group one?”
9. Each different t-distribution is defined by which of the following?
10. What is the relationship between the power of a statistical test and decision errors?