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Descriptive statistics deals with methods of()
对全国各铁路交通枢纽的货运量、货物种类等进行调查,以了解全国铁路货运概况。这种调查属于()
什么是季节变动?研究它的意义何在?如何测定季节变动?
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). The average number of absences per employee, calculated from the personnel data of all employees, is a ().
常用的长期趋势测定的方法有哪些?各有什么特点?
The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the cumulative frequency of the third class?()
The number of class intervals in a frequency distribution is usually between ().
最能反映离散程度的指标是()
If the individual class frequency is divided by the total frequency, the result is the ().
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()