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 5.4 with a standard deviation of 2.1.   ​(a) What response represents the 89th ​percentile? ​(b) What response represents the 59th ​percentile? ​(c) What response represents the first ​quartile?

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A:

Q: In a recent study on world happiness, participants were asked to evaluate their current lives on a…

A: μ=5.4, σ=2.6

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A: true mean value = 25 mu = 26.72 s = 2.6

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