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Unformatted text preview: Decision: The value of the test statistic is not in the Rejection Region. Do NOT Reject H at α = 0.05. b) (5) The player claims that he hits better during day games than during night 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 40 Y 2 2 2 ˆ = = n p = 0.25. 28 . ˆ 400 112 160 240 40 72 Y Y 2 1 2 1 = = + + = + + = n n p . Test Statistic: Z = +⋅ ⋅ 160 1 240 1 72 . 28 . 25 . 30 . = 1.09 . Pvalue: Right – tailed. Pvalue = ( area of the right tail ) = P( Z ≥ 1.09 ) = 0.1379 ....
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 Fall '11
 STEPHANOV
 Statistics, Statistical hypothesis testing, 5%, Statistical significance, Baseball statistics

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