(2.1-5: Select the most appropriate option from these choices: A. Onesample ztest B. lCinesample ttest C. Unpoolcd twosample ttcst D. Pooled twosample ttest E. Chisquare test of homogeneity F. Chisquare test ofindependence G. None of the above or cannot be determined with the given information 1. In a random sample of 180 patrons at a popular restaurant, it was determined that: 60 ate the seafood special and developed severe diarrhea, 10 did not eat the seafood special but still developed severe diarrhea, and TD ate the seafood special and did not develop severe diarrhea. What would be the most appropriate testing method for the following question \"was eating the seafood special associated with developing severe diarrhea?\" 2. Investigators measured the beforebreakfast plasma citrate concentrations for 100 randomly sampled adults. The sample mean was 119' umolfl. Suppose that the population of beforebreakfast plasma citrate concentrations for adults is known to follow a strongly skewed distribution with standard deviation known to be 20 tlIl'lOHl. What is the most appropriate method for testing whether the true average beforebreakfast plasma citrate concentration for adults is greater than 115 umob'l'? 3. The FDA wishes to compare the average amount of active ingredient in generic and brand name versions of a popular pain killer. The amount of active ingredient is determined in 40 randomly sampled doses of each ofthe two drugs. The amount of active ingredient is known to be normally distributed for each type of drug. The true standard deviation of the amount of active ingredient is unknown but assumed to be equal for the two drugs. What is the most appropriate testing method? 4. The FDA wishes to compare the average amount of active ingredient in generic and brand name versions of a popular pain killer. The amount of active ingredient is determined in 40 randomly sampled doses of each of the two drugs. The distribution of the amount of active ingredient is known to be grossly nonnormally distributed for the generic drug. The true standard deviation of the amount of active ingredient is unknown but assumed to be equal for the two drugs. What is the most appropriate testing method? 5. Bloodpressure measurements taken on the left and right arms of a person are assumed to be comparable. To test this assumption, in a single random sample of 40 people, systolic bloodpressure (SBP, measured in mm H g) readings are taken simultaneously on both arms, and the difference between left and right arm SBPs calculated. The true standard deviation of the difference in left and rightarrn SBPs is unknown. What is the most appropriate method for testing whether the average difference in left and rightarrn SBP is zero