1. 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 Counseling	Received Counselling		Patient	No Counseling	Received Counselling
1	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
4	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
11	14.82	15.89		29	37.83	32.67
12	33.18	24.68		30	39.63	7.88
13	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

1. 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] PLEASE TELL ME WHAT ONE-SIDED QUESTION I SHOULD ASK; WHAT TEST TO PERFORM; HOW TO PERFORM IT; AND IF A BOX PLOT IS OKAY TO COMPARE THE SODIUM LEVELS BETWEEN THE GROUPS

1. 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 =0.05. [2 Marks]

1. What is the p-value for the test statistic you calculated in question (b) above. Show your calculation. [1 Mark]