Directional Graph

Question

D = {Jets, Giants, Cowboys, 49’ers, Patriots, Rams, Chiefs}

Q = {Tom Brady, Joe Namath, Troy Aikman, Joe Montana, Eli Manning}

(1) Using D as the domain and Q as the range, show the relation between the 2 sets, with the correspondences based on which players are (or were) a member of which team(s). Show the relation in the following forms:

(a) Set of ordered pairs

(b) Directional graph

(c) Is the relation a function? Explain.

(2) Now, use set Q as the domain, and set D as the range. Show the relation in the following forms:

(a) Set of ordered pairs

(b) Directional graph

(c) Is the relation a function? Explain.

Question

(a) How does correlation analysis differ from regression analysis?

(b) What does a correlation coefficient reveal?

(c) State the quick rule for a significant correlation and explain its limitations.

(d) What sums are needed to calculate a correlation coefficient?

(e) What are the two ways of testing a correlation coefficient for significance?