4. In the expressionPr(deny = 1|P/I Ratio, black) = (-2.26 +2.74P/I ratio + 0.71black),the effect of increasing the P/I ratio from 0.3 to 0.4 for a white persona. is 0.274 percentage points.b. is 6.1 percentage points.c. should not be interpreted without knowledge of the regression R².d. is 2.74 percentage points.5. Omitting relevant regressors from the model results in OLS estimators that are:a. biased but more precise.b. are both unbiased and more efficient.c. both biased and less efficient.d. None of the above

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Answered: 5. Omitting relevant regressors from…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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(2.16) Table 2.12 comes from one of the first studies of the link between lung cancer and smoking, by Richard Doll and A. Bradford Hill. In 20 hospitals in London, UK, patients admitted with lung cancer in the previous year were queried about their smoking behavior. For each patient admitted, researchers studied the smoking behavior of a noncancer control patient at the same hospital of the same sex and within the same 5-year grouping on age. A smoker was defined as a person who had smoked at least one cigarette a day for at least a year. Table 2.12. Data for Problem 2.16 Cases 688 21 709 Lung Cancer Have Smoked Yes No Total Based on data reported in Table IV, R. Doll and A. B. Hill, Br. Med. J., 739-748, September 30, 1950. Controls 650 59 709 a) Identify the response variable and the explanatory variable. b) Identify the type of study this was. c) Can you use these data to compare smokers with nonsmokers in terms of the proportion who suffered lung cancer? Why or why not? d)…
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5. Omitting relevant regressors from the model results in OLS estimators that are: a. biased but more precise. b. are both unbiased and more efficient. c. both biased and less efficient. d. None of the above