They take 30 shots of each type and collect data to compare the number of shots actually scored to the number of counts registered on the electronic rate counter. They found the following:
z For 30 swish shots scored, the rate counter registered 30 counts. z For 30 slam dunks scored, the rate counter registered 18 counts.
z For 30 backboard shots scored, the rate counter registered 25 counts.
z For 30 toilet bowl shots scored, the rate counter registered 38 counts.
The students also observed that there were 17 occasions when the ball hit the rim but popped out again, not going into the net. However, the rate counter registered six of these misses as scores.
4 Discuss different ways that Robert and Louise could present their results. Are there any calculations they could do to show the accuracy of their system for the different types of shots?
Fig. 18.11.3 Robert and Louise
5 Write a paragraph that summarises the performance of the electronic system. For which type of shot did the system work the best? Why? For which type of shot did the system have the poorest performance? Why? Could you offer any advice on improving the performance of this system?
Hawk-Eye Technology
Hawk-Eye technology has become very popular in sports for detecting the position of a ball in games. It uses a number of high- speed video cameras that focus on the ball.
A large number of image frames taken by these cameras builds up a record of the path the ball has travelled. This is inputted to the processing technology of the Hawk-Eye software. Based on the rules of the game being played, the Hawk-Eye can tell if a shot was in or out, or a score was over the line or not.
Fig. 18.11.4 Hawk-Eye technology in action at a GAA match
6 Discuss the advantages of Hawk-Eye technology over the system Robert and Louise designed for detecting scores.
7 Can you suggest any disadvantages of Hawk-Eye technology? It might be useful to do some research on Hawk-Eye technology to inform your views.
