the following data are product weights for the same items produced on two different production lines. line 1 line 2 13.6 13.7 13.8 14.1 14.0 14.2 13.9 14.0 13.4 14.6 13.2 13.5 13.3 14.4 13.6 14.8 12.9 14.5 14.4 14.3 15.0 14.9