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...
关于标准偏差的问题(英文)about what proportion of the scores are within two standard deviations of the mean?这句话是什么意思呀? 答案 这是道数学问题意思是说分数或比数中大概有多少部分是在平均值(MEAN)的标差值(STANDARD DEVIATION)的范围内?因为我以前做的也是英文的中文的翻译可能有点没那么标准.相关推...
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 the mean. The variance measures the average degree to which each point differs from the mean. While standard deviation is the square root of ...
Deviation in statistics refers to the difference between an individual data point and the mean of the dataset. It highlights how far each observation is from the central value, without indicating the direction (positive or negative). Standard Deviation, on the other hand, is a measure that quant...
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. 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 ...
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. ...
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 ...
求这组数据的standard variation标准差14.88 14.94 20.04 25.13 32.34 33.11 33.32 35.76 38.12 48.57 49.86 57.86 58.9 65.79 66.76 68.7 71.47 72.44 76.84 77.43 What is the standard deviation of the data?(c) What does the difference between the mean and median tell you about the underlying distribution...
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%. 正确答案:C 分享到: 答案解析: Standard deviation = [∑i (xi − X)2 / (n − 1)]1/2 = √(744.10 / 9) = √(82.68) ...