摘要
以我国连续200期七星彩开奖号码为样本,采用卡方检验法检验每个字符出现的概率是否相同,并检验同一期开奖号码中字符重复出现的次数是否在可接受的范围之内。统计检验表明:我国七星彩的开奖号码具有较好的随机性。
This paper polls consecutive 200 period Chinese 7 - star lottery winning numbers as a sample, using Chi - square test method to test whether each character has the same probability appears in the winning number and to test recurring characters repeat times in a winning numbers ,Within the aeeeptable range. Statistical tests result shows that Chinese 7 - star lottery winning number was randomly.
出处
《河南机电高等专科学校学报》
CAS
2012年第4期34-37,共4页
Journal of Henan Mechanical and Electrical Engineering College
关键词
组合
排列
概率
卡方检验
combination
permutation
probability
chi - square test
