An investigation of the effectiveness of a training program to improve customer relationships included a pre-training and post-training customer survey. To compare the differences they computed (post-training survey score - pre-training survey score) . Seven customers were randomly selected and completed both surveys. The results follow. 
What is the value of the test statistic?
Definitions:
Mediator Role
The function of acting as an intermediary or neutral party to help resolve conflicts or disputes between two or more parties.
Disagreement
A situation in which two or more parties have differing opinions, beliefs, or perceptions about a certain topic or decision.
Task Groups
Task Groups are teams formed for the specific purpose of completing a particular job, project, or assignment, focusing on achieving defined objectives.
Human Rights
Universal rights that are inherent to all human beings, regardless of nationality, sex, ethnicity, color, religion, language, or any other status, ensuring fundamental freedoms and protections.
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