A large industrial corporation produces, among other things, balls used in computer mice. These plastic balls have a nominal diameter of 2 cm. Samples of 10 balls were taken from each of two different production lines, and the diameters of the sampled balls were measured. The results are given below.
Line 1: 2.18 2.12 2.24 2.31 2.02 2.09 2.23 2.02 2.19 2.32
Line 2: 1.62 2.52 1.69 1.79 2.49 1.67 2.04 1.98 2.66 1.99
(a) Calculate summary statistics and make side-by-side box plots for the two production lines.
(b) Two important issues in production are being on target and having minimal variation. Write a short discussion of the two production lines describing which line seems to be doing a better job, and why?