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...
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 ...
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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...
The sample mean of a data set can be computed by adding all the data points divided by the total data points in that sample which is commonly referred to as sample size (n). The population means is usually denoted by the symbol μ, whereas the sample means is indicated by ...
百度试题 题目Assuming a mean of 7.2%, what is the sample standard deviation of the returns for ABC Mutual Fund for the period 1991-2000? A. 7.8%. B. 9.8%. C. 9.1%.相关知识点: 试题来源: 解析 C 略 反馈 收藏
What is the standard deviation of the portfolio of U.S. and Korean assets that Davis is considering?A. 5.0%.B. 27.0%.C. 22.5%. 正确答案:C 分享到: 答案解析: To calculate the standard deviation of the portfolio, use both the individual stocks risk as well as the correlation between th...
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零,即所有数据点相同。B 选项,均值不一定为零;C 选项,数据量大小与此无关;D ...
Using n-1 would make the sample standard deviation larger than otherwise using n. Therefore, we have a less biased estimate of the population standard deviation, giving us a conservative estimate of variability. What is Standard Error (SE)?
In this example, N is 10 and N-1 would be 9. The result is a sample variance of 82.5/9 = 9.17 and a population variance of 8.25. Note that the standard deviation is the square root of the variance, so the standard deviation is about 3.03 for a sample data set. The standard devia...