Identify (be specific) the observational units in this study.Height of Wimbledon Players Over Time Is height an advantage for tennis players? There have certainly been successful tennis players both short and tall throughout history. Body size and composition is often rated very low in importance for tennis, however its role is not insignificant. Tall players with a good arm length can reach more areas of the court with ease, and when serving a player with longer arms can generate more racket speed and contact the ball from a higher height. On the other hand, being shorter is usually associated with greater balance and agility, very important for quickly covering all areas of the tennis court. As the depth of players and competitiveness of tennis has increased over time, so has generally player height. Analysis of the standing height of Wimbledon winners for the last 100 years shows a gradual increase in average height, particularly since the 1960s.Increasing Height Trend since the 1960s We have data for most of the winners since 1960, and grouping them by decade helps to even out the data. The graph below shows a clear trend of the champion players getting taller. The average male champion in the 1960s was 178cm (5 ft 10 in), and in the 2010s up until 2016 it is 188cm (6 ft 2 in). For the females, it has increased from 170cm (5 ft 7 in) in the 1960s up to a peak of 181cm (5 ft 11.5 in) in the 2000s. tennis player's height over time The data for 2010 include all player' T