AN ANALYSIS OF TEMPORAL NUMERICAL SUPERIORITY IN THE PAN-AMERICAN JUNIOR MEN’S WATER POLO MATCHES

ABSTRACT This study compared the frequency, number of goals and attack efficiency in temporal numerical superiority among winning and losing teams and among balanced and unbalanced matches in a junior men’s water polo competition. Another analysed relationship was that between a balanced or unbalanced final score and the efficiency at scoring goals in numerical superiority in the winning teams’ games. A total of 56 matches from the Pan-American Junior Men’s Water Polo championship was analysed. The teams were categorised as losers or winners and the match results were classified as balanced or unbalanced. The chi-squared and Mann-Whitney tests were used for statistical treatment. There is no significant difference in the occurrence of numerical superiority between winners and losers (p = 0.25) despite the winners scoring more goals (p = 0.002) and being more efficient (p摘要：本研究针对男子青少年水球赛事中的胜、负队伍，以及比分胶着与非胶着赛事，对比了临时人数优势（temporal numerical superiority）场景下的进攻频次、进球数与进攻效率。本研究同时分析了获胜队伍赛事中，最终比分胶着与否与人数优势场景下进球效率之间的关联。本次研究共分析了泛美男子青少年水球锦标赛的56场赛事。研究将参赛队伍划分为胜队与负队，并将比赛结果分为胶着与非胶着两类。统计分析采用卡方检验（chi-squared test）与曼-惠特尼U检验（Mann-Whitney test）完成。尽管获胜队伍的进球数更多（p = 0.002）且进攻效率更高（p），但胜队与负队在人数优势出现频次上并无显著差异（p = 0.25）。