Xr13-52 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 in which eight documents are scanned by each of the two scanners he is interested in. 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 brand B?

Document 1 2 3 4 5 6 7 8 Brand A 17 29 18 14 21 25 22 29 Brand B 21 38 15 19 22 30 31 37