ECO220Y1 Final: ECO220Y1Y UTSG Term Test 220 3 Final ExamB17 Solution
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ECO220Y1 Full Course Notes
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February 10, 2017, 9:10 11:00 am (1) (a) given that the question asks for the size of an effect, we should us a confidence interval estimation approach for inference, not a hypothesis testing approach. Further, we must recognize that these are paired data. =(cid:3493)17. 72117(cid:2870)+15. 29706(cid:2870) 2 0. 6387 17. 72117 15. 29706=14. 2 (cid:1850)(cid:3364)(cid:3031) (cid:1872)(cid:3080) (cid:2870) (cid:3046)(cid:3279) (cid:3041) with degrees of freedom (cid:2021)=(cid:1866) 1 (cid:1871)(cid:3031)=(cid:1845)(cid:1830)[(cid:1850)(cid:2870) (cid:1850)(cid:2869)]=(cid:3493)(cid:1848)[(cid:1850)(cid:2870)]+(cid:1848)[(cid:1850)(cid:2869)] 2 (cid:1870) (cid:1845)(cid:1830)[(cid:1850)(cid:2869)] (cid:1845)(cid:1830)[(cid:1850)(cid:2870)] (60. 8 53. 04) 2. 064(cid:2869)(cid:2872). (cid:2870)(cid:2868)(cid:2872) (cid:2870)(cid:2873) with degrees of freedom (cid:2021)=25 1=24. 7. 76 5. 86 (cid:1838)(cid:1829)(cid:1838)=1. 9;(cid:1847)(cid:1829)(cid:1838)=13. 6 we are 95% confident that marks on the test, which are out of 100 points, are between 1. 9 points and 13. 6 points higher after the one-day course. [note this is quite wide: we"re talking about getting anywhere between less than one additional multiple-choice question right to getting almost 7 additional questions right. ] (b) you should expect this suggestion to result in an unacceptably wide confidence interval.