6. An important hypothesis in hypertension research is that sodium restriction may lower blood pressure. However, it is difficult to achieve sodium restriction over the long term, and dietary counseling in a group setting is sometimes used to achieve this goal. The data on urinary sodium (mEq/8hr) in the table below were obtained from 36 older adults who had received 8 weeks of prior dietary counselling and 32 older adults who received no dietary counselling. Previous research has shown that sodium is not normally-distributed in the older adult population. Use these data to answer the questions below the table. Patient No Received Patient No Counseling Received Counselling Counseling Counselling 27.85 30.50 19 19.76 34.52 2 12.03 9.59 20 19.08 23.01 3 21.84 4.55 21 34.57 15.67 14 13.94 20.78 22 19.66 13.28 5 16.68 11.69 23 36.81 26.87 6 41.78 32.51 24 40.34 24.37 7 14.97 5.46 25 32.51 30.00 8 22.07 12.95 26 37.54 23.11 9 17.65 16.50 27 30.78 19.81 10 20.56 11.63 28 19.57 20.92 1 1 14.82 15.89 29 37.83 12 32.67 33.18 24.68 30 13 39.63 7.88 14.96 9.64 31 43.87 33.45 14 28.97 18.93 32 17.65 26.75 15 40.08 19.45 33 21.00 16 36.76 30.78 34 16.89 17 36.11 22.46 35 26.79 18 31.58 25.87 36 22.01 a. Select an appropriate plot to compare urinary sodium levels in the two groups. Based on the plot, develop a one-sided question that could be answered by a hypothesis test of the difference in mean sodium levels between the 2 groups. [2 Marks] b. Conduct the appropriate statistical test to answer the one-sided question you developed in question (a) above. What is the answer to your question? Show all calculations. Assume a=0.05. [2 Marks] . What is the p-value for the test statistic you calculated in question (b) above. Show your calculation. [1 Mark]