Ashford 3: - Week 2 - Assignment

Question 1. 1. The standard error of the mean is actually the standard deviation of all of the means that make up the distribution of sample means. (Points : 1)

Question 2. 2. What statistic measures data variability in both groups in an independent t-test? @Answer found in section 4.5 The Independent Samples t-Test, in Statistics for Managers (Points : 1)

Question 3. 3. Statistical significance for a tested mean difference means practical significance as well. (Points : 1)

Question 4. 4. 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 (Points : 1)

Question 5. 5. The desired sample size depends only the size of the population to be tested. (Points : 1)

Question 6. 6. The critical value of t to determine statistical significance depends on the sample size. (Points : 1)

Question 7. 7. What question does the z test answer? (Points : 1)

Question 8. 8. 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 (Points : 1)

Question 9. 9. How do statistical tests like the one sample t adjust for the absence of parameter values? @Answer found in section 4.3 The One-sample t-Test, in Statistics for Managers (Points : 1)

Question 10. 10. What is the probability of type II error when the null hypothesis is rejected? @Answer found in section 4.3 The One-sample t-Test, in Statistics for Managers (Points : 1)