Planner Stats 10 A&0 Air Pollution A&O Lab 3 X Stats10+Practi... IT IT O Problem 18. The population of interest to the researchers is (a) All persons who go into Ackerman Union (b) All UCLA students (c) All UCLA buildings (d) All UCLA students who go into Ackerman Union (e) All persons Problem 19. The sample is (a) 100 persons who went into Ackerman Union (b) 100 UCLA students (c) 100 UCLA students who went into Ackerman Union (d) 85 happy students (e) 100 responses Problem 20. Which one of the following best describes the relationship between the correlation and the slope of the regression line modeling the relationship between X and Y ? (a) The correlation between X and Y equals the slope of the regression line modeling the relationship between X and Y . (b) When the correlation between X and Y is zero, the slope of the regression line modeling the relationship between X and Y is negative. (c) The sign of the correlation between X and Y is the same as the sign of the slope of the regression line modeling the relationship between X and Y. (d) The correlation between X and Y is not related to the slope of the regression line modeling the relationship between X and Y . (e) When the correlation between X and Y is zero, the slope of the regression line modeling the relationship between X and Y is positive. Problem 21. Which of the following types of graphical tools for data allows you to see the actual data values (assuming no digits are dropped)? (a) Histogram (b) Ribbon chart (c) Boxplot (d) Dotplot (e) Bar chart