Preservative Leather furniture used in public places can fade, crack, and deteriorate rapidly. An ...

Preservative Leather furniture used in public places can fade, crack, and deteriorate rapidly. An airport manager wants to see if a leather preservative spray can make the furniture look good longer. He buys eight new leather chairs and places them in the waiting area, four near the south-facing windows and the other four set back from the windows as shown. He assigned the chairs randomly to these spots.

a. Use the random numbers given to decide which chairs to spray. Explain your method clearly.
3 2 2 1 9 0 0 5 9 7 8 6 3 7 4

b. Briefly explain why your assignment strategy is important in helping the manager assess the effectiveness of the leather preservative.