ard In an experiment to determine whether there is a systematic difference between the weights obtained with two different mass balances, six specimens were weighed, in grams, on each balance. The following data were obtained: Specimen A B 12.31 12.34 9.60 9.58 10.06 10.07 6.21 6.20 6.49 6.47 10.30 10.29 Compute the test statistic. O 0.058 O 0.170 O 0.379 O 0.415