HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 137
Two-Proportion Z-Test
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hp40g+.book Page 11 Friday, December 9, 2005 1:03 AM Inputs The inputs are: Field name x n π0 α Definition Number of successes in the sample. Sample size. Population proportion of successes. Significance level. Results The results are: Result Test P Test Z Prob Critical Z Description Proportion of successes in the sample. Z-Test statistic. Probability associated with the Z-Test statistic. Boundary value of Z associated with the level you supplied. Two-Proportion Z-Test Menu name Z-Test: π1 - π2 On the basis of statistics from two samples, each from a different population, the Two-Proportion Z-Test measures the strength of the evidence for a selected hypothesis against the null hypothesis. The null hypothesis is that the proportion of successes in the two populations is equal H0: π1= π2. You select one of the following alternative hypotheses against which to test the null hypothesis: H1:π1 < π2 H1:π1 > π2 H1:π1 ≠ π2 Inference aplet 11-11