6. For each ofie following statement: state whether you agree or disagree with the statement Provide your reasoning. You may provide diagrams or algebra or worked examples in your answer if needed. =1) You are hired as a quantitative analyst to a NGO called Zealandia. The NGO recently implements a aming program for the unemployed and you are asked to evaluate the impact of the program on earning of program participants. You have been given a data set containing the earnings ofa random sample of workers, in which some received training and some did not. To get a true impact of the program, we can simply compare mean income ofworkers with training and mean income ofworloers without training. ECONSZU'S Check Your Understanding Topics 4 6 b) 8) d) If we found that number of police is strongly negatively correlated with crime rate, thus we can safely conclude that increases in the number ofpolice would cause a decline in the crime rate. Like cross-sectional observations, we can assume that most time series observations are independently distributed A trending variable cannot be used as the dependent variable in multiple regression analysis lfwe have modeled the trend adequately intime series regressions, we can just look at the value of R2 as a reliable guide to whether the model is a good model. The estimates of the effect of training on accidents is given by: f; = 9040221253}; 443.4st 41161;?\" 1ra_9.lr,_3 where Y; is accident losses in dollars permonth andX: are hours ofsafety training provided to each worker per month. The cumulative effect of the reduction of losses due to safety training is $125.9 Forthe modely =30 +1x+ s, ifthere are variables omitted from the regression that are relevant determinants ofthe dependent variable, then the OLE estimator of fl] is biased