i. Evie and colleagues describe an improved photometric method for determining Fe³* based on its ability to catalyze the oxidation of sulphanilic acid by KIO4. As part of their study the concentration of Fe3+ in human serum samples was determined by the improved method and the standard method. The results, with concentrations in umol/L, are shown in the following table. Improved Method Standard Method 8.25 8.06 9.75 8.84 9.75 8.36 9.75 8.73 10.75 13.13 11.25 13.65 13.88 13.85 14.25 13.53 Determine whether there is a significant difference between the two methods at a=0.05. Derive the conclusions using data analysis feature of Microsoft Excel. Show the output of Microsoft Excel, explain your decision and the conclusion derived.

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