Use the data given below to answer the following problem. This is also on the excel data file. The following extract from a manufacturer's database shows a sample of 10 suppliers, their transportation charges, and the estimated and actual total costs of supplying materials. (Note: Assume a significance level of 0.05 wherever necessary.) Supplier Transportation Estimated Actual Charges Total Cost Total Cost Peter 340 4,500 4,680 John 560 4,500 4,790 Martin 480 4,500 5,110 Philip 290 4,500 4,780 Mark 370 4,500 4,810 Thomas 520 4,500 4,770 Jaison 350 4,500 5,250 David 430 4,500 4,930 Carter 510 4,500 5,010 Leonard 270 4,500 4,810