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Unformatted text preview: similar patients: The first group of 500 had the new procedure while the second group of 500 had the second procedure. The following results were observed Procedure n number with the serious side effect New (1) 500 48 Current(2) 500 85 Is the above data statistically significant that the new procedure reduces the proportion of patients who have the Serious side effect? ∧ 1 p = = 500 48 = .096 ∧ 2 p = = = .170 1) Ho: p 1 = p 2 Ha: 2) α = .05 3) reject Ho if Z Z ≥ α = 1.645 4) p' = = .133 q' = .867 z = 5) TI PHStat Stats 2 Prop ZTest 2 sample tests x 1 48 z = 3.446 Z test differences in proportions n 1 500 pval = 2.849 x104 Hypothesized difference x 2 85 sample 1 nbr successes 48 n 2 500 sample size 500 p 1 <p 2 sample 2 nbr successes 85 sample size 500 lower tailed test...
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This note was uploaded on 12/05/2011 for the course MATH 2040 taught by Professor Raysievers during the Fall '10 term at Utah Valley University.
 Fall '10
 RaySievers
 Statistics, Standard Deviation

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