Many people use scanners to read documents and store them in a Word (or some other software) file. To help determine which brand of scanner to buy, a student conducts an experiment wherein eight documents are scanned by each of the two scanners in which he is interested. He records the number of errors made by each. These data are listed here. Can he infer that Brand A (the more expensive scanner) is better than BrandB?

Document Brand A Brand B 1 23 4 5 67 8 17 29 18 14 21 25 22 29 21 38 15 19 22 30 31 37