The scatterplot in Fig. 62 compares the prices of hot dogs and soft drinks at all the

Question:

The scatterplot in Fig. 62 compares the prices of hot dogs and soft drinks at all the Major League Baseball (MLB) stadiums.

a. Describe the four characteristics of the association. You do not have to compute r.
b. The correlation coefficient is 0.83. Does this support your analysis of the strength of the association in part (a)? Explain.
c. Because the association is positive, a student concludes that if a stadium raises the price of hot dogs, then it will raise the price of soft drinks. What would you tell the student?
d. A researcher suspects that there is a lurking variable, which is the costliness of a city. She reasons that if she is right, then there should be a positive, linear association between prices of any pair of concessions available at the stadiums. Figure 63 shows a scatterplot that compares the prices of hot dogs and beers at all the MLB stadiums. The value of r is 0.27. Do the scatterplot and r support the researcher€™s suspicion? Explain.