Answer:
Explanation:
Employee Pre Post difference
1 10000 14000 4000
2 12000 11000 -1000
3 11000 13000 2000
4 8000 10000 2000
5 9000 12000 3000
Total=10000
Mean difference = Total difference/number of employees
= 10,000 /5 = 2000
Mean difference = 2000.