Perform a formal statistical analysis using paired confidence intervals and the data in Table 16-3 to confirm that package waiting time is less in the workers share lanes case than in the case where a worker serves 3 lanes.

a. Compare average package waiting time with each worker serving 3 lanes (2^nd column) with the average waiting time for lanes served by only one worker, the non-shared lanes (4^th column).

b. Compare average package waiting time in the shared lines (5^th column) and the non-shared lanes (4^th column). 

Table 16-3