Describe how to find +/- 1 standard deviation. What is the average and standard deviation of the mean for these data ? a) 8604, 8744, 8333, 8323, 7321, 8172 b) 6321, 6448, 6273, 6175, 5351, 6102 {85,60,95,95,100,75,52,60,99,80} (( (xi-X)2)/(N-1))1/2 Solve the ...
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 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 ...
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...
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 ...
A standard deviation of returns is a method of using statistical principles to estimate the volatility levels of stocks and...
原题是:“A list of numbers has a mean of 8 and a standard deviation of 2.5.If x is a number in the list that is 2 standard deviations above the mean,what is the value of ”能说一下具体怎么写,我感觉没看懂这道题...是一道GRE数学题... 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更...
The standard deviation of 33,34,35,36 is y. What is the standard deviation of 433,434,435,436?
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 选项,不是随机分布。反馈 收藏 ...
Suppose x is a predictor variable used for predicting the explanatory or response variable. Then standard deviation of the predictor variable is...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough ...