On Discordance Tests for the Wrapped Cau-chy Distribution

• 作者: A. H. Abuzaid M. M. El-hanjouri M. M. Kulab
• 来源期刊: 统计学期刊(英文)
• 学科: 医学
• 关键词: ARC LENGTH Circular DISTANCE OUTLIER Wrapped Normal DISTRIBUTION
• 年，卷（期）: 2015,（4）
• 页码范围: 245-253
• 页数: 9页
• 分类号: R73

摘要

Circular data as any other types of data are subjected to contamination with some unexpected observations which are known outliers. In this paper, four tests of discordancy for circular data based on M, C, D, and A statistics are extended to the wrapped Cauchy distribution to detect possible outliers. The cut-off points and the power of performances are investigated via extensive simulation study. Results show that tests perform better as the concentration of the samples is increased. Two real circular data sets are analysed for illustration.