The following data are product weights for the same items produced on two different production lines. Test for a difference between the product weights for the two lines. Use . Line 1 Line 2 13.7 14.7 13.7 13.7 13.4 13.9 13.2 15.1 13.0 14.7 14.2 14.0 14.0 15.2 13.9 14.9 13.8 14.7 13.0 14.1 14.7 15.1 What is the value of the test statistic