Trar'isfusions for Bleeding In the Stomach Should patients who are bleeding from the stomach get transfusions when their hemoglobin level falls below I" grams per deciliter [restrictive strategy) or when it falls to 9 grams per deciliter [liberal strategy]? A study.r used random assignment with 451 patients assigned to the restrictive strategy and 45D to the liberal strategy [villanueva et al. 2013}. The table shows survival after six weeks in each group. \"I a. Calculate the percentage alive in each of the treatment groups, and write a sentence comparing the percentages in the contth of this study. Call the restrictive group 1 and the liberal group 2, and find the difference, pl- p2. b. Find a 95% confidence interval for the difference in proportions alive in the two groups. and explain whether the interval captures D and what that means. Use the same difference as in part a. Assume that the conditions are met. although we have random assignment and not a random sample. c For the 95% confidenoe interval from part b, explain what the signs of the boundary values mean and whether we can conclude that one treatment causes the better result. d. If you had a relative with bleeding and his hemoglobin level dropped to 8.5 grams per deciliter. would you argue for a transfusion or wait until it dropped further