Question

Question 1 3 pts Consider the histogram below from a class of 321 students: Histogram of Total Course Points 140 120 100 80 Number of Students 60 40 20 0 Below 500 500 to 599 600 to 699 700 to 799 800 to 899 900 and above Total Course Points (1000 possible) Which of the following is a correct statement based on the histogram above? The arithmetic mean score is greater than the median score. o No answer text provided. The distribution of total course points is symmetric. o The distribution of total course points is negatively skewed. Question 2 3 pts Consider the following estimated regression model using OLS: Y = b + b2ln (X2) The interpretation of the estimated slope coefficient in the model is as follows: O a one unit change in X is associated with a 100b2 percent change in predicted Y. o a 1 percent change in X is associated with a b2 percent change in predicted Y. o a 1 percent change in X is associated with a b2/100 unit change in predicted Y. o a one unit change in X is associated with a b2 change in predicted Y. Question 3 3 pts Suppose that you estimate a regression model with a sample size of 112 observations and 10 explanatory variables, including the intercept, using ordinary least squares and the residual sum of squares from this estimated model is 22. You then conduct a Ramsey's RESET on this model and the residual sum of squares from the Ramsey regression is 20. The test statistic associated with this Ramsey's RESET IS and you can conclude at the 5-percent level of significance that 1; the regression is not misspecified. 2; the regression is not misspecified. O5; the regression is misspecified. O4; the regression is misspecified.

Answer 1

The distribution of total total course point P's assymebic from visual inspection Thus option ® is incorrect It is infact negatively skewed distribution obtion D is correct It is negatively skewed arithmetic mean score is lesser than the option D is Thus median core. incorrect 2) = Y; Taking dyi dtzi b + b2 en Xzi derivative with respect to Xzi be Yzi to find the interpretation of bz Xzi dYi dXzi we have be bz d Yi dXzi Xzi both sides d Yi dyzi Xzi by 1100 → Mertiply b 100 - bz 100 in we Thus can Changen in unit change Thus, Absoute Change in y percentage change interpret that 1 percent x ů associated with b2/100 in predicted y is correct option ©