Unformatted text preview: of the Red Army soldiers is 82 kg. H : μ = 85 vs. H 1 : μ ≠ 85 2 – tailed. α = 0.2302. α / 2 = 0.1151. 2 α z = z 0.1151 = 1.20 . Rejection Region: Reject H if Z = σ μ X n< 2 α zor Z = σ μ X n> 2 α z ⇒ σ μ 2 α X n z< or σ μ 2 α X n z + > ⇒ 9 10 20 . 1 85 X< or 9 10 20 . 1 85 X + > ⇒ 81 < X or 89 > X Power = P ( Reject H  H is false ) = P ( 81 X <  μ = 82 ) + P( 89 X >  μ = 82 ) = > + < 9 10 82 89 Z P 9 10 82 81 Z P = P ( Z < – 0.30 ) + P( Z > 2.10 ) = 0.3821 + 0.0179 = 0.40 ....
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 Fall '11
 STEPHANOV
 Statistical significance, Red Army

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