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 i

Question

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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Thạch Thảo 3 years 2021-09-03T01:35:21+00:00 1 Answers 35 views 0

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  1. huyenthanh
    0
    2021-09-03T01:36:34+00:00
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    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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