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People tend to evaluate the quality of their lives relative to others around them. In a...

  1. People tend to evaluate the quality of their lives relative to others around them. In a demonstration of this phenomenon, Frieswijk, Buunk, Steverink, and Slaets (2004) conducted fictitious interviews with frail elderly people. In the interview, each person was compared with others who were worse off. After the interviews, the elderly people reported more satisfaction with their own lives. A researcher decided to replicate this study. In her study, nine elderly people completed a life-satisfaction scale. For this particular scale, . The researcher collected the following data: 20, 17, 22, 23, 19, 25, 27, 21, 25. Is this sample significantly more satisfied with life than the general population? State whether a z test or one-sample t test should be used to analyze the data and why that test should be used.
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