HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 135
Two-Sample Z-Test
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hp40g+.book Page 9 Friday, December 9, 2005 1:03 AM Results The results are: Result Test Z Prob Critical Z Critical x Description Z-test statistic. Probability associated with the Z-Test statistic. Boundary values of Z associated with the α level that you supplied. Boundary values of x required by the α value that you supplied. Two-Sample Z-Test Menu name Inputs Z-Test: μ1-μ2 On the basis of two samples, each from a separate population, this test measures the strength of the evidence for a selected hypothesis against the null hypothesis. The null hypothesis is that the mean of the two populations are equal (H0: μ1= μ2). You select one of the following alternative hypotheses against which to test the null hypothesis: H1:μ1 < μ2 H1:μ1 > μ2 H1:μ1 ≠ μ2 The inputs are: Field name x1 x2 n1 n2 σ1 Definition Sample 1 mean. Sample 2 mean. Sample 1 size. Sample 2 size. Population 1 standard deviation. Inference aplet 11-9