BUS 308 Week 2 Quiz

1. The one-sample t-test differs from the z-test in which way?
@Answer found in section 4.3 The One-sample t-Test, in Statistics for Managers

2. If a certifying agency raises the requirements for real estate agents, what sort of decision error is the agency protecting against?

3. What is the alternate hypothesis in a problem where sales group two is predicted to be “. . . significantly less productive than sales group one?”
@Answer found in sections 4.3 The One-sample t-Test and 4.4 Hypothesis Testing, in Statistics for Managers

4. Which of the following defines statistical significance?

5. The standard error of the mean can be calculated by dividing μ by the square root of the number of values in the distribution.

6. How does variability in the distribution of sample means compare to variability in a population based on individual scores?

7. The z-test can be used to test mean differences even when the initial data set is not normally distributed.

8. What is the advantage of a one-tailed test over a two-tailed test?
@Answer found in section 4.3 The One-sample t-Test, in Statistics for Managers

9. The z- test requires an estimate of the population standard deviation.

10. The standard error of the mean is actually the standard deviation of all of the means that make up the distribution of sample means.