in a recent study on world​ happiness, participants were asked to evaluate their current lives on a scale from 0 to​ 10, where 0 represents the worst possible life and 10 represents the best possible life. the mean response was with a standard deviation of . ​(a) what response represents the ​percentile? ​(b) what response represents the ​percentile? ​(c) what response represents the ​quartile?



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