1 1. The first few questions have to do with the parallel tests that we use when we DO have an adequately large sample size. They will be followed by questions where the sample size is small so non-parametric tests must be used. What is the name of the test where we compare one group of students who get a new reading curriculum to another who got the old curriculum. Assume n is 40 for both classrooms. Matched pairs t-test Single mean t-test T-test for two means ANOVA Question 2 1. What is the name of the test where we give a pre-test, then education on the topic and then a post-test. We subtract the pre-test score from the post-test score and study the difference. n is over 30. Matched pairs t-test Single mean t-test T-test for two means ANOVA Question 3 1. In the past it took us 2 hours to produce a widget. We make changes to the manufacturing process. We take a sample of 49 completion times after the changes to see if we can convince ourselves that manufactuing time has decreased. Matched pairs t-test Single mean t-test T-test for two means ANOVA Question 4 1. What is the name of the test if we have five different cholesterol reducing drugs and give them to five different groups of patients with 30 different people in each group. We want to see if any one of them is more effective at reducing cholesterol than the others Matched pairs t-test Single mean t-test T-test for two means ANOVA Question 5 1. What is the name of the test where we compare one group of students who get a new reading curriculum to another who got the old curriculum. Assume n is 10 for both classrooms. Wilcoxon Signed Rank Test Wilcoxon Signed Rank Test on differences Wilcoxon Rank Sum Test Kruskall-Wallis Test Question 6 1. What is the name of the test where we give a pre-test, then education on the topic and then a post-test. We subtract the pre-test score from the post-test score and study the difference. n is 12. Wilcoxon Signed Rank Test Wilcoxon Signed Rank Test on differences Wilcoxon Rank Sum Test Kruskall-Wallis Test Question 7 1. In the past it took us 2 hours to produce a widget. We make changes to the manufacturing process. We take a sample of 9 completion times after the changes to see if we can convince ourselves that manufactuing time has decreased. Wilcoxon Signed Rank Test Wilcoxon Signed Rank Test on differences Wilcoxon Rank Sum Test Kruskall-Wallis Test Question 8 1. What is the name of the test if we have five different cholesterol reducing drugs and give them to five different groups of patients with 8 different people in each group. We want to see if any one of them is more effective at reducing cholesterol than the others Wilcoxon Signed Rank Test Wilcoxon Signed Rank Test on differences Wilcoxon Rank Sum Test Kruskall-Wallis Test Question 9 1. For non parametric tests we generally use what instead of the actual data values for the calculations Ranks Medians Number of Ohio State Graduates with poor hygeine Question 10 1. What are Ho and Ha for the Wilcoxon signed rank test for a two-sided test. Ho: The distribution for one group is different from the other; Ha: No difference in distribution of the dependent variable for the two groups. Ho: No difference in distribution of the dependent variable for the two groups;Ha: The distribution for one group is different from the other Ho: No difference in distribution of the dependent variable for the two groups;Ha: The distribution for one group is higher than the other Question 11 1. Using the least amount of assumptions about the population distributions, the Ho and Ha of a Kruskall-Wallis Test are what? Note that M stands for median. Ho: mu1=mu2=mu3=mu4=mu5; Ha: At least one of them is different Ho: M1=M2=M3=M4=M5; Ha: At least one of the Medians is different Ho: The distribution of the dependent variable is the same in all five groups.; Ha: The dependent variable is systematically higer for some groups. Question 12 1. Generally, non-parametric tests got their name because They are used on smaller samples The Ho and Ha do not make reference to a population parameter They are based on Ranks Question 13 1. The Wilcoxon Signed Rank test is executed by ranking the absolute values of the differences and then summing up the ranks of the positive differences True False Question 14 1. The Wilcoxon Sum Rank test is executed by ranking the absolute values of the differences and then summing up the ranks of the positive differences True False Question 15 1. It is impossible to estimte the population parameters for any of the non-parametric tests True False Question 16 1. The Wilcoxon Sum Rank test is executed by ranking the values for all the respondents and then summing up the ranks for one of the two groups True False