A.nonparametric statistics
B.nominal data
C.descriptive statistics
D.inferential statistics
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A.binomial
B.uniform
C.normal
D.Possion
A.68%
B.95%
C.99.7%
D.none of the above
A.the variance is not as accurate a measurement as the standard deviation
B.the standard deviation has been corrected for bias while the variance has not
C.the standard deviation is in the same units as the data values.
D.the variance is in the same units as the data values.
A.square
B.absolute value
C.minimum
D.maximum
A.median;mean
B.data point;mean
C.quartile;median
D.data point;median
A.approximation theorem
B.normal probability theorem
C.central limit theorem
D.central normality theorem
A.sample based upon information contained in the population
B.population based upon information contained in the sample
C.population based upon information contained in the population
D.mean of the sample based upon the mean of the population
最新试题
Which of the following is not the goal of descriptive statistics?()
Claudia Taylor, Director of Global Industrial Sales in Melbourne, is concerned by a deteriorating sales trend. Specifically, the number of customers is stable at 1500 but they are purchasing less each year. She orders her staff to search for causes of the downward trend by selecting a focus group of 40 industrial customers. For this study, the set of 40 industrial customers is a ().
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?
If the individual class frequency is divided by the total frequency, the result is the ().
以2000年a0为最初水平,2016年an为最末水平,计算钢产量的年平均发展速度时,须开()
对某班级学生的生活状况进行统计调查,下列标志中属于不变标志的是()
Descriptive statistics deals with methods of()
最能反映离散程度的指标是()
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()
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 ().