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。
the standard deviation is small. When the examples are spread apart and the bell curve is relatively flat, that tells you you have a relatively large
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 ...
Understanding standard deviation helps businesses make informed decisions by providing insights into the variability and consistency of data. It is a fundamental statistical tool that aids in risk assessment, quality control, and performance evaluation. ...
Standard addition is a way of finding the actual concentration of a material in a mixture by comparing it to an identical mixture...
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...
百度试题 题目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%.相关知识点: 试题来源: 解析 C 略 反馈 收藏
If the variance of a random variable X is 4, what is the standard deviation of X? A. 16 B. 2 C. 4 D. 8 相关知识点: 试题来源: 解析 B。本题考查方差与标准差的关系。方差是标准差的平方,已知方差为 4,标准差等于方差的平方根,即 2。
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%. 正确答案:B 分享到: 答案解析: The ...
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...