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What percentage of countries has a happiness score

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The world happiness report 2017 provides a happiness score for countries using the data collected by the Gallup World Poll. Assuming happiness score is approximately normal with mean 5.35 with a standard deviation of 1.13, answer the below questions.

- What percentage of countries has a happiness score of at least 7.0?

- What percentage of countries has a happiness score less than 3.0?

- What percentage of countries has a happiness score in between 3.0 and 6.0?

Reference no: EM132853557

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