Quantitative Analysis and Significance Testing

Quantitative Analysis and Significance Testing
1- Looking at the research paper exploring the value of massage to chronic pain relief explain how the researchers were able to judge that the data collected was parametric?
2 Looking at the research paper what average was calculated to compare the outcome of the two groups? What criteria needed to be met for the researchers to use this average?
3 Explain what the test of significance established about their findings.
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