1. What is the Spearman coefficient of rank correlation, what range of values can it have, and how is its numerical value interpreted?
2. Two travel editors have each ranked 10 popular vacation spots according to the value they represent for the money. The sum of the squared differences between their rankings is 28. Determine and interpret the Spearman coefficient of rank correlation. At the 0.05 level, does rs differ significantly from 0?
3. For the data of Exercise 14.16, convert the hus- bands' and wives' expenditures to ranks, then determine and interpret the Spearman coefficient of rank correlation. At the 0.05 level, does rs differ significantly from 0?A Republican and a Democrat candidate for politi- cal office have each rated the 12 most recent pieces of leg- islation in their state from 1 (most beneficial to the state) to 12 (least beneficial). Given the data shown here, deter- mine and interpret the Spearman coefficient of rank corre- lation. At the 0.02 level, does rs differ significantly from 0?
Legislation A B C D E F G H I J K L Republican's ranking 1 2 3 4 5 6 7 8 9 10 11 12
Democrat's ranking 3 4 6 9 8 5 10 7 12 11 1 2
(DATA SET) Note: Exercises 14.58-14.63 require a computer and statistical software.