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8 Perform the indicated test of hypotheses, based on the information given. Test H0:μ=105H0:μ=105 vs. Ha:μ>105Ha:μ>105...

8

Perform the indicated test of hypotheses, based on the information given.

  1. Test H0:μ=105H0:μ=105 vs. Ha:μ>105Ha:μ>105 @ α=0.05α=0.05, σ unknown, n = 30, x⎯⎯=108x-=108, s = 7.2
  2. Test H0:μ=21.6H0:μ=21.6 vs. Ha:μ<21.6Ha:μ<21.6 @ α=0.01α=0.01, σ unknown, n = 78, x⎯⎯=20.5x-=20.5, s = 3.9
  3. Test H0:μ=−375H0:μ=−375 vs. Ha:μ≠−375Ha:μ≠−375 @ α=0.01α=0.01, σ = 18.5, n = 31, x⎯⎯=−388x-=−388, s = 18.0

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