Ores R' Us was experimenting with water treatment methods known to be effective at removing iron from waste water before returning it to the river system. They changed the method every two weeks and took water quality measurements daily to assess the relative effectiveness of each method. Given the results of their testing below, and brief recommendation on which method they should be using. Your recommendation should include which method was the most effective, what was the average amount removed by the most effective method, which method was the least effective, what was the average amount removed by the least effective method, and how many times better the best removal method was when compared to the least effective method. (5)

Following is the table which you have given and after observing this table give the answers

	Average Untreated Fe = 5.089 mg/L
Day	Method 1 Fe (mg/L)	Method 2 Fe (mg/L)	Method 3 Fe (mg/L)	Method 4 Fe (mg/L)
1	0.6	1.32	0.37	1.93
2	0.71	1.27	0.34	2.16
3	0.76	1.41	0.37	2.16
4	0.77	1.28	0.31	1.96
5	0.7	1.54	0.35	2.05
6	0.62	1.59	0.37	1.99
7	0.46	1.56	0.43	1.91
8	0.74	1.56	0.43	1.88
9	0.47	1.11	0.42	1.98
10	0.6	1.29	0.28	2.18
11	0.76	1.27	0.32	2.3
12	0.51	1.52	0.32	1.85
13	0.46	1.26	0.28	2.1
14	0.66	1.47	0.42	2