A. variance B. spread C. mean D. median 相关知识点: 试题来源: 解析 B。本题主要考查对标准差概念的理解。标准差是衡量数据分散程度的指标,也就是spread。选项 A 方差与标准差不同;选项 C 均值不是标准差的含义;选项 D 中位数也与标准差无关。反馈 收藏 ...
A. central tendency B. variability C. symmetry D. skewness 相关知识点: 试题来源: 解析 B。A 选项 central tendency 中心趋势。B 选项 variability 变异性,标准差是衡量数据离散程度,即变异性的指标,符合题意。C 选项 symmetry 对称性。D 选项 skewness 偏度。反馈...
“The standard deviation is a measure of the dispersion of a set of numbers.” In this statement, “standard deviation” is not similar to ___. A. mean deviation B. variance C. coefficient of variation D. arithmetic mean 相关知识点: 试题来源: 解析 D。“standard deviation”是标准差...
Standard deviation is a statistical measure that indicates how much variation or dispersion exists in a set of data. It measures the amount of variation or deviation from the average or mean value of the data. The standard deviation is a widely used statistical tool in research, quality control...
a简单来说,标准差是一组数据平均值值分散程度的一种度量。一个较大的标准差,代表大部分数值和其平均值之间差异较大;一个较小的标准差,代表这些数值较接近平均值。 Simply speaking, the standard deviation is a group of data mean value value dispersion degree one kind of measure.A big standard deviation...
解析 B。解析:标准差(standard deviation)是衡量数据离散程度(spread or dispersion of data)的统计量。它表示数据相对于均值的分散情况。均值是衡量数据中心位置(The central location of data)的一种方式。相关系数是衡量两个变量之间关系(The relationship between two variables)的统计量。
The standard deviation is the square root of the variance. If the variance of a data set is 4, the standard deviation is ___. A. 1 B. 2 C. 3 D. 4 相关知识点: 试题来源: 解析 B。解析:方差为 4,标准差是方差的平方根,即 2。反馈...
A. The central tendency. B. The spread of the data. C. The highest value. D. The lowest value. 相关知识点: 试题来源: 解析 B。标准差(standard deviation)是用来衡量一组数据的离散程度,即数据的分散情况。选项 A 中央趋势由平均数、中位数和众数等衡量;选项 C 是最高值;选项 D 是最低值。反...
(S) may be given by the formula S=n where E indicates that the squared differences between the value of each item of dat a and the mean should be summed.For example, to find the standard deviation of the ages of a group of eight people in a room, the mean is first found ( in ...
A. the spread of the data around the mean B. the total number of data points C. the highest value in the data set D. the lowest value in the data set 相关知识点: 试题来源: 解析 A。“standard deviation”是标准差的意思,衡量数据围绕均值的分散程度。B 选项是数据点的总数;C 选项是数据...