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19-06-2021
Mathematics

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According to a government study, among adults in the 25- to 34-year age group, the mean amount spent per year on reading and entertainment is $2,020. Assume that the distribution of the amounts spent follows the normal distribution with a standard deviation of $456. Use Appendix B.3. (Round your z-score computation to 2 decimal places and final answers to 2 decimal places.) What percent of the adults spend more than $2,600 per year on reading and entertainment

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19-06-2021

Answer:

z = x-u/s

z = 2600 - 2020/456

z = 1.27

= .897

1-.898 = .102

z > 1.27 = 10.2%

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