Tennis players are more likely to win points when they are serving. A tennis journalist wondered whether

Question:

Tennis players are more likely to win points when they are serving. A tennis journalist wondered whether the server€™s advantage diminished as a rally lasted longer. She randomly selected 209 points from all the matches played at the major tennis tournaments during a year. For each point, she recorded whether the rally was short (the ball went back and forth no more than twice before the point was decided) or the rally was long (the ball went back and forth more than two times). She also recorded whether the server won the point or not. The table below shows the results. She found Ï‡²(1, N = 209) = 3.93, p < .05 and calculated Cramer€™s V = .14. Write a four-point interpretation.

Observed Frequencies Server Wins Server Loses Short rally 66 41 Long rally 49 53 Expected Frequencies Server Wins Server