Use the Birthweight_Smoking data set introduced in Empirical Exercise E5.3 to answer the following questions. To begin, run three regressions: Birthweight on Smoker Birthweight on Smoker, Alcohol, and Nprevist Birthweight on Smoker, Alcohol, Nprevist, and Unmarried What is the value of the estimated effect of smoking on birth weight in each of the regressions

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer

At the beginning of a call to the cable company, a message tells customers, "after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you recieved. it would be appreciated if you could stay on the line to answer the survey questions." what type of sampling is the cable company using?

If y varies as x, and y=8 as x=4 what will be the value of y if x=2