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Unformatted text preview: Section A : Learning Team 9 10.9 A. B. No, since the range can both be positive and negative, which means that the having a car can either improve or lower your academic achievement. C. D. Since 1.41 > 1.645, then we can reject the null hypothesis due to lack of evidence. 10. 11 A. B. => We therefore reject null hypothesis C. p-value is less than 0.00001 therefore, reject null hypothesis at all values of α D. Based on the range, we are 99% confident that the purchasing managers have a higher perception of the technical support services as compared to technical managers. 10.23 a. b. Since p-value =0.046 at α = 0.10, reject null hypothesis at α = 0.05, reject null hypothesis at α = 0.01, keep null hypothesis at α = 0.001, keep null hypothesis We have very strong evidence that dollar amounts differ from Ohio and Illinois. c. => => => Based on the range, we are 95% confident that the credit manager in Illinois is much better than the one in Ohio since most of range is lies in the positive region indicating that most of...
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- Spring '08
- Statistics, Null hypothesis, Statistical hypothesis testing