To promote the cruise industry in Florida, suppose that James Thorne of the Cruise imperium of Ormond Beach fan an advertisement in 17 tourism magazines Readers were invited to write for additional brochures and literature. The two variables to be related are Xi cont of advertising and circulation, in thousands of dollars Y:return on inquiry cost where the latter is defined as v - (estimated revenue from inquiries-cost of advertisement) cost of advertisement nalysis of Cambrils u34 Table 14.19 lists the ranks of these two variables for the 17 magazine advertise ments. Calculate the Spearman tank correlation coefficient and test for association be tween the variables, Table 14.19 Rank Correlation Calculations for the Cruise Example Ranx(x) RankY) = RANK :) -- RANY) 144 th 2 2 4 16 1 5 4 5 14 8 1 16 17 13 15 2 7 3 6 12 4 -15 15 12 7 7 144 7 39 4 100 10 11 11 5 13 12 17 3 7 14 15 10 4 4 13 14 15 16 17 5 4 11 12 10 Sum 1,165