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 收藏 ...
A national consensus is used to find out information about the nation's citizens. By definition, it includes the whole population. Therefore, a population standard deviation would be used. What are the formulas for the standard deviation? The sample standard deviation formula is: where, s = ...
aThe standard deviation its defined as the aquare root of the mean of the squared deviations from the mean. All this means is that we square the deviations above, take the mean as before and then take the square root of the answer. This is the standard deviation foe the first bag 标准...
aThe standard deviation its defined as the aquare root of the mean of the squared deviations from the mean. All this means is that we square the deviations above, take the mean as before and then take the square root of the answer. This is the standard deviation foe the first bag. 标准...
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...
The standard deviation measures the dispersion of a set of data. A. variation B. deviation C. dispersion D. standard deviation 相关知识点: 试题来源: 解析 D。“standard deviation”是标准偏差,专门用于衡量数据的离散程度;“variation”变化;“deviation”偏差;“dispersion”分散。反馈 收藏 ...
Standard Deviation Equation, Formula & Examples from Chapter 13/ Lesson 4 218K The standard deviation of a data set is a measurement of how close, in aggregate, its values are to the mean. The baseline from which this distance is measured is the mean of the data set. In short, a lower...
1 Computing the Standard Deviation of Sample Means1计算样本标准偏差的方法 热度: Derivation of the Mean and Standard Deviation of the Binomial:的平均值和标准偏差推导的二项式 热度: INSIDE THIS ISSUE President’s Column 1 - 2 Editor’s Column 3 ...
Standard Deviation and Variance in Investing These two concepts are of paramount importance for both traders and investors. That’s because they are used to measure security and market volatility, which plays a large role in creating a profitable trading strategy. Standard deviation is one of ...