A.the number of classes must be less than 10
B.each data point can only fall into one class
C.the width of each class is equal to the range
D.the number of intervals must be an odd number
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A.it contains more class intervals
B.the values of the original data are retained
C.the class midpoints are used as the stem
D.the class midpoints are used as the leaf
A.3 and 5
B.7 and 9
C.5 and 15
D.1 and 25
A.an ogive
B.a histogram
C.a frequency polygon
D.a stem and leaf plot
A.midpoint frequency
B.cumulative frequency
C.stem and leaf plot
D.relative frequency
A.ogive
B.histogram
C.frequency distribution
D.stem and leaf plot
A.Summarising data
B.Displaying aspects of the collected data
C.Reporting numerical findings
D.Estimating characteristics of the population
A.descriptive statistics
B.inferential statistics
C.nonparametric statistics
D.wishful thinking
A.One form of descriptive statistics uses graphical techniques
B.One form of descriptive statistics uses numerical techniques
C.In the language of statistics,the term population refers to a group of people
D.Statistical inference is used to draw conclusions or inferences about characteristics of populations based on sample data
A.organising data.
B.summarising data
C.presenting data in a convenient and informative way
D.doing all of the above
A.population
B.sample
C.parameter
D.statistic
最新试题
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
常用的长期趋势测定的方法有哪些?各有什么特点?
Which of the following is not the goal of descriptive statistics?()
某企业的生产计划完成百分比采用如下分组,请指出哪项是正确的()
If the individual class frequency is divided by the total frequency, the result is the ().
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 ().
A cumulative frequency distribution would provide().
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()
A cumulative frequency polygon is also called ().
One advantage of a stem and leaf plot over a frequency distribution is that ().