Five soda companies have agreed to bring in a time management plan in hopes of increasing the productivity (measured in cases of soda bottled per hr). The # of cases of soda bottled/pr hr before and after the implementation of the plan are below. Company 1 2 3 4 5

Before 500 475 525 490 530

After 510 480 525 495 533

Test, at level 0.05, whether time management has been effective in increasing productivity.

Let Tobs be the observed value of the appropriate test statistics.