Correlation Between Winning and Technique and Tactics in World Women's Volleyball CompetitionsBased on Data Volley 4 and Grey Correlation Analysis

The correlation indicators for winning in world women's volleyball competitions were examined by using grey correlation analysis and Data Volley 4. The results show that spike scores has the highest correlation, and each team presents an attacking system of "fast, strong, diverse" and "three-dimensional and efficient". Serving has become the primary emphasis in the volleyball competitions, highlighting "tactical" and "efficacy". Blocking highlights the initiative of attack and defense, emphasizing the "regional cooperation" and "guarantee efficacy" of blocking organizations, an important support for the counterattack process. Besides, the guarantee section emphasizes the absolute accuracy of receiving and serving the ball, which is the foundation for supporting "tactical" and "rapid and changeable". The number of good passes in the organizational process enhances the unpredictability of the game, creating organizational space for victory while service errors are the most influential in the self loss process. The measures for Chinese Women's National Volleyball Team in the preparations for Paris Olympic cycle are thereafter proposed: ① Establish the concept of "technical volleyball" to enhance the dominance of various technical links in the competition; ②Establish a "data volleyball" think tank to strengthen the continuous tracking and data-driven preparation of opponents; ③Adhere to the concept of "targeted preparation" and accurately refine the preparation work.