Question 14.141

gameranking

25. Video Game Ranking. GameRankings.com publishes summary statistics for reviews of video games. The following data set represents a random sample of video games and their average reviewer score for the PlayStation 3 platform and the Xbox 360 platform, as of January 23, 2009. Test whether a rank correlation exists between the two game platforms, using level of significance .

Game PlayStation 3
mean reviewer
score
Xbox 360
mean reviewer
score
Grand Theft Auto IV 0.9373 0.9656
BioShock 0.9403 0.9525
Call of Duty 4:
Modern Warfare
0.9378 0.9416
Rock Band 0.9119 0.9225
The Orange Box 0.8838 0.9624
Guitar Hero III:
Legends of Rock
0.8390 0.8622