Costco has three different data analysts in BC and they suggested three different plans to classify hourly wage rate of the employees of the company as follows:

Plan 1 Plan 2 Plan 3

0-5 0-5 0-5

5-10 5.1-10 6-10

10-15 10.1-15 11-15

15-20 15.1-20 16-20

20-25 >= 20 >20

Compare these three different plans with each other and discuss if they are effective for classifying the wage rates or not. If you were the data analyst at Costco which plan would you suggest? If your answer is none, what would be your suggested plan?