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...
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。
While standard deviation measures the square root of the variance, the variance is the average of each point from the mean. Key Takeaways Standard deviation and variance are two key measures commonly used in the financial sector. Standard deviation is the spread of a group of numbers from ...
explain what“1 standard deviation above the average score"means。能用英语回答就更好了, 相关知识点: 试题来源: 解析 "1 standard deviation above the average score" means that the observation value minus the population mean just equals to 1 standard deviation.The average score is the population ...
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...
In a data set, if the standard deviation is zero, what can be concluded? A. All the data points are the same. B. The mean is zero. C. The data set is very large. D. The data set is randomly distributed. 相关知识点: 试题来源: 解析 A。解析:标准偏差为零意味着数据的离散程度为...
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. ...
What is the standard deviation of a portfolio if you invest 30% in stock one (standard deviation of 4.6%) and 70% in stock two (standard deviation of 7.8%) if the correlation coefficient for the two stocks is 0.45? A. 0.38%. B. 6.20%. C. 6.83%. 相关知识点: 试题来源: 解析 B...
Given a mean of 10% and a standard deviation of 14%, what is a 95% confidence interval for the return next year?A. -17.44% to 37.44%.B. -4.00% to 24.00%.C. -17.00% to 38.00%. 正确答案:A 分享到: 答案解析: 10% +/- 14(1.96) = -17.44% to 37.44%. 统计:共计41人答过,平...