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March 25, 2017

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A random sample of six CEOs reported how many times per year they play tennis. The data follows.

3 41 96 32 52 19

Assuming the number of games played is normally distributed and the population standard deviation σ = 10, a 95% confidence interval for μ is:

  • Business Statistics - ,

    95% = mean ± 1.96 SEm

    SEm = SD/√n

  • Business Statistics - ,

    28.5

  • Business Statistics - ,

    10

  • Business Statistics - ,

    28.5, 44.5

  • Business Statistics - ,

    28.5,44.5

  • Business Statistics - ,

    96

  • Business Statistics - ,

    55

  • Business Statistics - ,

    3 96

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