BUSN5000 HW5 Part A

9/25/23, 5 : 37 PM Homework 5: Measurement Error and Sample Selection Page 1 of 5 https://chris-cornwell.shinyapps.io/Assignment_5/#section-a.-short-answer A. Short answer Sources of bias Question 1: If an estimator is consistent, any _____ and its sampling _____ If an estimator is consistent, any _____ and its sampling _____ vanish as sample size grows. vanish as sample size grows. bias, error Correct! Question 2: If an estimator is consistent, we say it _____ the estimand. If an estimator is consistent, we say it _____ the estimand. identifies Correct! Question 3: When a CPS respondent refuses to report their earnings there is When a CPS respondent refuses to report their earnings there is an _____ nonresponse. an _____ nonresponse. item Correct! Continue Measurement error Question 4: Let’s say that Let’s say that is the true is the true but is not directly observed but is not directly observed because of measurment error. A simple model for this scenario because of measurment error. A simple model for this scenario is _____ = is _____ = + _____. + _____. x, e X X X Homework 5: Homework 5: Measurement Measurement Error and Error and Sample Sample Selection Selection A. Short answer (https://chris- cornwell.shinyapps.io/Assignment_5/#section- a.-short- answer) B. Empirical exercise (https://chris- cornwell.shinyapps.io/Assignment_5/#section- b.- empirical- exercise) Submission Start Over

9/25/23, 5 : 37 PM Homework 5: Measurement Error and Sample Selection Page 2 of 5 https://chris-cornwell.shinyapps.io/Assignment_5/#section-a.-short-answer Correct! Question 5: If If is _____ to the measurement error, we cannot learn is _____ to the measurement error, we cannot learn anything about the distribution of anything about the distribution of from the distribution of from the distribution of _____. _____. related, X Correct! Question 6: The classical measurement-error assumptions include that the The classical measurement-error assumptions include that the expected value of the measurement error is _____ and the expected value of the measurement error is _____ and the measurement error independent of the true _____. measurement error independent of the true _____. 0, x Correct! Question 7: One implication of classical measurement error is that One implication of classical measurement error is that _____ _____ , where , where is another random is another random variable to which variable to which might be related. might be related. < Correct! Question 8: When When is binary, measurement error results in _____ and the is binary, measurement error results in _____ and the _____ assumptions don’t apply. _____ assumptions don’t apply. misclassification, classical Correct! Question 9: X X corr( X , Y ) corr( , Y ) X Y X X

9/25/23, 5 : 37 PM Homework 5: Measurement Error and Sample Selection Page 4 of 5 https://chris-cornwell.shinyapps.io/Assignment_5/#section-a.-short-answer If the selection mechanism is _____ of the If the selection mechanism is _____ of the and and , then we say , then we say missing data are missing _____. missing data are missing _____. independent, completely at random Correct! Question 14: If If represents the selection mechanism and represents the selection mechanism and , then we say the missing data are missing , then we say the missing data are missing _____ or the mechanism is _____. _____ or the mechanism is _____. at random, exogenous Correct! Question 15: In the In the card card data, 949 men do not have an IQ test score. This data, 949 men do not have an IQ test score. This would violate _____ if the probability would violate _____ if the probability that a score is missing is that a score is missing is higher for lower IQ men. higher for lower IQ men. MCAR Correct! Question 16: One way to _____ missing values is to predict them using a One way to _____ missing values is to predict them using a statistical model. statistical model. impute Correct! Continue Next Topic X Y S E ( Y X , S ) = E ( Y X )

9/25/23, 5 : 37 PM Homework 5: Measurement Error and Sample Selection Page 5 of 5 https://chris-cornwell.shinyapps.io/Assignment_5/#section-a.-short-answer