Marh problem-help please

hypothesis? Scenario D: Another team of investigators reviewed medical records to determine which military personnel among several basic training units had received a previous type of meningitis vaccine during training two decades ago. Two study groups were formed, those who had not received the vaccine and those who had. These were followed forward by record review throughout the duration of their active military service, and if they had a record of care through the VA system, these records were searched as well. The outcome of interest was the occurrence of any of a number of autoimmune diseases that were thought to have a possible association with the vaccine. In this study, of a vaccine group of 70, 4 individuals were found to have been diagnosed with lupus at some subsequent point in time. In the non- vaccine group of 105, only 2 individuals had that diagnosis 1. What type of study is this and what attributes makes it so? (See week 2 PPT): 2. What is the independent variable in this scenario, and what type is it? What is the dependent variable in this scenario, and what type is it? 3. State a null hypothesis. 4. What is the most appropriate measure of association to compare the rates of occurrence of autoimmune disease between the two groups and Why? Calculate that measure of association. 5. What is the most appropriate statistical test of significance of this measure of association and Why? Calculate the test result using the on-line calculator. Which test option should you use? What is the result? 6. Using the same on-line calculator as for problems #1 and #2, perform this test. What are the 2-tailed p-value results? 7. What do the results mean regarding the null hypothesis