CH_10_Comparing_means_of_related_populations_and_proportions - CH 10 Comparing Means of Related Populations and Proportions 1 Macrosoft a software


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CH 10: Comparing Means of Related Populations and Proportions 1. Macrosoft, a software application company, has just developed a new financial applications package. It claims to provide the same features as the current market leader in financial applications software, but is faster in processing speed. In order to test this assertion, 10 randomly selected financial projects are selected and then run on the software of both the market leader and Macrosoft’s. The results are given in the file COMPTIME. At the 0.05 level of significance, is there evidence that the mean processing time is significantly greater when financial applications projects use the current market leader rather than Macrosoft’s software package? 2. You are the manager of TC Resort Properties which owns two hotels, Beachcomber and Windsurfer, on a particular island. In tabulating responses to the single question, “Are you likely to choose this hotel again?”, 163 of 227
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Unformatted text preview: guests at the Beachcomber responded yes, and 154 of 262 guests at the Windsurfer said yes. At the 0.05 level of significance, is there evidence of a significant difference in guest satisfaction between the two hotels? Results for: COMPTIME.MTW Paired T-Test and CI: Current, New Paired T for Current - New N Mean StDev SE Mean Current 10 9.92600 0.08631 0.02729 New 10 9.84200 0.03994 0.01263 Difference 10 0.084000 0.084354 0.026675 95% lower bound for mean difference: 0.035102 T-Test of mean difference = 0 (vs > 0): T-Value = 3.15 P-Value = 0.006 Test and CI for Two Proportions Sample X N Sample p 1 163 227 0.718062 2 154 262 0.587786 Difference = p (1) - p (2) Estimate for difference: 0.130275 95% CI for difference: (0.0467379, 0.213813) Test for difference = 0 (vs not = 0): Z = 3.01 P-Value = 0.003...
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  • Spring '12
  • webber
  • Statistics, MACROSOFT, Windsurfer

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