最新试题
要了解某地区全部大学生的就业情况，那么（）
某班的学习按考试成绩分为60分以下，60-70，70-80，80-90，90-100，这种分组（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
A cumulative frequency distribution would provide（）.
Which of the following statements is not true？（）
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 （）.
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 approximate range of the number of phone calls arriving each hour？（）
Descriptive statistics deals with methods of（）
The number of class intervals in a frequency distribution is usually between （）.
品合格率指标是（）