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Unformatted text preview: Decision: The value of the test statistic is in the Rejection Region. Reject H at α = 0.10. b) (5) The player claims that he hits better during night games than during day games. Find the pvalue of the test H : p Day = p Night vs. H 1 : p Day < p Night . 240 72 Y 1 1 1 ˆ = = n p = 0.30. 160 56 Y 2 2 2 ˆ = = n p = 0.35. 32 . ˆ 400 128 160 240 56 72 Y Y 2 1 2 1 = = + + = + + = n n p . Test Statistic: Z = +⋅ ⋅ 160 1 240 1 68 . 32 . 35 . 30 . = – 1.05 . Pvalue: Left – tailed. Pvalue = ( area of the left tail ) = P( Z ≤ – 1.05 ) = 0.1469 ....
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 Fall '11
 STEPHANOV
 Statistics, 10%, Statistical hypothesis testing, Statistical significance, Baseball statistics

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