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If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
企业生产一种产品需顺次经过四个车间,这四个车间的废品率分别为1.5%、2.0%、2.0%和1.0%。该企业生产这种产品的平均废品率是多少?
变量数列中,各组频率之和应()
某厂某年职工劳动生产率为20000元,是历史最高水平的1.2倍。这里的1.2倍是()
常用的长期趋势测定的方法有哪些?各有什么特点?
如果居民按报告期价格购买商品需多支出40万元,报告期商品销售额为200万元,则价格指数为()
某企业2018年技术工占50%,2019年新招收了一批学徒工,使学徒工的比重增加了10%。假定全厂各级工资水平均无变化,则2019年职工总平均工资将()
Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a ().
The number of class intervals in a frequency distribution is usually between ().