Question

You are interested in examining the effect of depth on oil dispersal 2 years after the Exxon Valdez oils spill in Alaska in 1989 by using the amount of ANS crude found in sediment as an indicator of oil contamination. Provide an appropriate graph to describe the data, include a figure caption and include a summary paragraph describing the figure provided. (Follow the CSE guideline format)

Table 1 Concentrations of ANS crude (ng/g dry weight of sediment) in sediments at 3 different depths after the Exxon Valdez oil spill in a heavily oiled bay in Prince William Sound, Alaska (data from Boehm et al. 1998).

Sample	10-50m	50-100m	100-150m
1	126	110	93
2	64	39	35
3	62	47	48
4	84	75	62
5	82	66	33
6	173	80	65
7	92	56	61
8	63	72	29
9	71	44	80
10	93		48
11	202
12	73
13	100
14	132
15	201
16	93

Answer 1

Histogram Concentration of ANS 250 200 150 10-50 m 50-100nm 100-150 m 100 50 Sample Line Chart Concentration of ANS 250 200 173 150 10-50 m 132 126 10 50-100 m 100 XX冫 92 93 93 80 100-150 m 73 50 29 1 2 345 578 9 10 11 12 13 14 15 16

From the above two graphs if the depth is decreases then Concentrations of ANS crude (ng/g dry weight of sediment) is increases.

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