Repair and replacement costs of water pipes. Pipes used in a water distribution network are susceptible to breakage due to a variety of factors. When pipes break, engineers must decide whether to repair or replace the broken pipe. A team of civil engineers estimated the ratio of repair to replacement cost of commercial pipe based on the diameter (in millimeters) of the pipe. (IHS Journal of Hydraulic Engineering, September 2012.) Data for a sample of 13 different pipe sizes are provided in the table. Use a scatterplot to aid the engineers in detecting a trend in the data. Does it appear that ratio of repair to replacement cost is strongly associated with pipe size? DIAMETER RATIO 80 6.58 100 6.97 125 7.39 150 7.61 200 7.78 250 7.92 300 8.20 350 8.42 400 8.60 450 8.97 500 9.31 600 9.47 700 9.72 Source: C. R. Suribabu and T. R. Neelakantan, “Sizing of Water Distribution Pipes Based on Performance Measure and Breakage-Repair Replacement Economics,” IHS Journal of Hydraulic Engineering, Vol. 18, No. 3, September 2012 (Table 1). H2OPIPE