Distribution Free Hypothesis Testing: Paired Wilcoxon Signed Rank Test Example (2)
Автор: Mrs E Hodgetts
Загружено: 2021-06-08
Просмотров: 502
Описание:
An athletics coach wishes to test the value to athletes of an intensive period of weight training and so selects twelve 400-meter runners from the region and records their times, in seconds, to complete this distance. They then undergo the programme of weight training and have their times, in seconds, for 400-meters measured again. The table below summarises the results
Athlete A B C D E F G H I J K L
Before 51.0 49.8 49.5 50.1 51.6 48.9 52.4 50.6 53.1 48.6 52.9 53.4
After 50.6 50.4 48.9 49.1 51.6 47.6 53.5 49.9 51.0 48.5 50.6 51.7
Use a Wilcoxen signed-rank test, at the 5% level of significance, to investigate the hypothesis that the training programme will significantly improve the athletes' times for the 400-meters.
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