A manager wants to determine if an employee training program has increased her employees’ customer satisfaction ratings. She ran
domly selects 10 of the participating employees and compares their customer satisfaction ratings before and after the training. The results are shown in the table. Employee Before After Difference
1 4.2 4.3 0.1
2 3.7 3.6 Negative 0.1
3 2.9 3 0.1
4 3.2 3.3 0.1
5 3.1 3 Negative 0.1
6 4.1 4.2 0.1
7 2.8 2.9 0.1
8 2.8 2.7 Negative 0.1
9 4 4.2 0.2
10 3.6 3.7 0.1
How can the values in the Difference row of the table be interpreted?
A. A negative difference means that the program was effective, and any positive differences can be ignored.
B. A positive difference means that the employee’s rating increased after the program, and a negative difference means that the employee’s rating decreased after the program.
C. A positive difference means that the employee’s rating decreased after the program, and a negative difference means that the employee’s rating increased after the program.
D. A positive difference means that the program was effective, and any negative differences can be ignored.
