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  • 12-04-2024
  • Mathematics
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The security department of a large office building wants to test the null hypothesis that σ = 2.0 minutes for the time it takes a guard to walk his round against the alternative hypothesis that σ ǂ 2.0 minutes. What can be concluded at the 0.01 level of significance if a random sample of size n = 31 yields s = 1.8 minutes.

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