Sec 9.2 - Sec 9.2 Two proportions Pooled Sample Proportion...

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Sec. 9.2 Two proportions Pooled Sample Proportion: Test Statistic: P-value: Can be obtained using Techno Critical Values: Can be obtained using Techno Confidence Interval: 1 2 1 2 x x p n n 1 q p   1 2 1 2 1 2 ˆ ˆ ( ) ( ) p p p p z pq pq n n 1 2 0 p p 1 2 1 2 1 2 ˆ ˆ ˆ ˆ ( ) ( ) ( ) p p E p p p p E 1 1 2 2 / 2 1 2 ˆ ˆ ˆ ˆ p q p q E z n n

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ology or Table A2(Normal Distribution) ology or Table A2(Normal Distribution) 1 2 1 2 1 2 ˆ ˆ ; x x p p n n
Sec. 9.2 Two proportions Test the given claim. Identify the null hypothesis, alternati P-value or critical values(s), conclusion about the null hypo that adresses the original claim. #8 GINKGO for Dementia. Set-up your own table Group 1 Group 2 Ginkgo Placebo x= 246 x1 277 n= 1545 n1 1524 P1^= 0.159223 q1^= 0.84078 P2^= 0.181759 q2^= 0.81824 0.170414 0.829586 a) Test the claim that Ginkgo is effective in preventing If the medicine works this disease, the patients are fewer p= ̄ q= ̄ 1 2 1 2 x x p n n 1 q p   1 2 1 2 1 2 ˆ ˆ ( ) ( ) p p p p z pq pq n n 1 2 1 2 1 2

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