Standard Deviation is a statistical tool that is used widely by statisticians, economists, financial investors, mathematicians, and government officials. It allows these experts to see how variable a collection of data is. Furthermore, SD is calculated as the square root of the variance of the ...
A sample of 50 items has a variance of 16. What is the standard deviation? A. 2 B. 4 C. 8 D. 16 相关知识点: 试题来源: 解析 B。本题考查方差和标准差的关系。标准差是方差的平方根,方差为 16,标准差为 4。A 选项 2 错误;C 选项 8 错误;D 选项 16 错误。
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...
Standard deviation tells you if the estimate is accurate C. Standard deviation tells you how unsure the estimate is D. Standard deviation tells you if the E. stimate includes a pad 相关知识点: 试题来源: 解析 C 标准差和风险有何关系? A. 没有关系 B. 标准差告诉你估算是否准确 C. 标准差...
While standard deviation is the square root of the variance, variance is the average of the squared difference of each data point from the mean. The two concepts are useful and significant for traders, who use them to measure market volatility. Standard Deviation Standard deviation is a statis...
Standard deviation is a statistical value used to determine how close data points are to a mean value. A standard deviation of...
A. The data is widely spread. B. The data is closely clustered. C. The data is randomly distributed. D. The data is not reliable. 相关知识点: 试题来源: 解析 B。本题考查“standard deviation(标准差)”的概念理解。统计数据显示数据的标准差很小,这意味着数据紧密聚集,A 数据广泛分布,C 数据...
1. What is the difference between descriptive and inferential statistics? The first main difference between standard deviation and standard error is thatstandard deviation is a descriptive statisticwhilestandard error is an inferential statistic. So what’s the difference?
If a data set has a large range but a small standard deviation, what can be concluded? A. The data is highly variable. B. The data is evenly distributed. C. The data has outliers. D. The data is relatively consistent E. xcept F. or a few extreme values. ...
A. The data is closely clustered around the mean B. The data is widely spread out from the mean C. The data has a small range D. The data has a high median 相关知识点: 试题来源: 解析 B。如果一组数据的标准差很大,说明数据离均值比较分散。A 选项是数据紧密围绕均值;C 选项是数据极差小...