2. Data set below represents monthly salaries of 8 randomly chosen fresh graduates from each of the four colleges A, B, C, D. Suppose salary is Normally distributed. Monthly Salaries of Fresh Graduates (unit=10,000) A B C D 16.66 19.01 21.21 21.27 21.77 26.20 13.99 17.16 25.20 15.86 19.69 23.04 21.71 22.54 14.78 18.51 15.80 15.28 17.65 14.49 19.19 22.67 16.30 24.70 22.17 16.14 26.70 19.64 18.15 20.14 16.64 16.36 (a) Can we conclude if fresh graduates from A get higher average salary than those from B? Report p-value. Conclude at a = 5%. (b) Can we conclude if fresh graduates from C get higher average salary than those from D? Report p-value. Conclude at a = 10%