Unformatted text preview: = ( area of the right tail ) = P ( Z ≥ 1.60 ) = 0.0548 . b) (7) If α = 0.015 is used, find ( the significance level ) and ( the power of the test if the true value of the overall average weight of adult elephant is μ = 12,345 ). Significance level = α = 0.015 . Test Statistic: σ is known. 9 450 000 , 12 X X Z σ μ== n . Rejection Region: Right  tailed. Reject H if Z > z α = 2.17. 9 450 17 . 2 000 , 12 X ⋅ + > = 12,325.5. Power ( μ = 12,345 ) = P ( Reject H  μ = 12,345 ) = P ( X > 12,325.5  μ = 12,345 ) = > 9 450 345 , 12 12,325.5 Z P = P ( Z > – 0.13 ) = 0.5517 ....
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This note was uploaded on 11/15/2011 for the course STAT 409 taught by Professor Stephanov during the Fall '11 term at University of Illinois at Urbana–Champaign.
 Fall '11
 STEPHANOV

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