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 difference between an expected value of an observation or measurement and the actual value. 2 Common Curiosities How is Standard Deviation calculated? Standard Deviation is calculated by taking the square root of the average of the squared deviations from the mean. 14 Can deviation be negative...
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 ...
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. ...
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...
s refers to sample standard deviation ∑ refers to sum of values xi refers to each value x̅ refers to sample mean N refers to number of values in the sample At this stage, simply having the mathematical formula may not be all that helpful. Let’s take a look at the actual steps in...
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...
The standard normal distribution is defined by a bell-shaped curve. It is also symmetric like the normal distribution but it has a mean equal to 0. The variance and standard deviation are equal to 1. Answer and Explanation:1 A standard normal distribution, Z...
Step 2: Find Each Score’s Deviation From the Mean To obtain the Mean deviations, you should first subtract the calculated Mean value from each dataset score. This process helps you understand how each data point differs from the mean or average. This indicates whether a data point is above...
Variance, on the other hand, gives an actual value to how much the numbers in a data set vary from the mean. Standard deviation is the square root of the variance and is expressed in the same units as the data set. Variance can be expressed in squared units or as a percentage (...