xample 11

To investigate the effectiveness of a training program on customer relations, the organizer had given a pre-training and a post-training survey to the participants. To compare the differences, they computed a post-training survey score and a pre-training survey score. Seven customers were randomly selected and completed both surveys. The survey scores for all the seven customers are shown below:

Customer	Pre-training Survey	Post-training Survey
A	6	8
B	5	5
C	10	10
D	7	10
E	6	8
F	5	6
G	2	8

Test whether the training program was effective in improving customer relations at the .05 significance level.