The variance is a measure of how far a set of numbers is spread out from their average value. A. dispersion B. variance C. deviation D. difference 相关知识点: 试题来源: 解析 B。“variance”是方差,用于衡量数据与平均值的离散程度;“dispersion”分散;“deviation”偏差;“difference”差别。
As a measure of variability, the variance is useful. If the scores in our group of data are spread out, the variance will be a large number. Conversely, if the scores are spread closely around the mean, the variance will be a smaller number. However, there are two potential problems ...
The spread of data means how much individual results differ from the average. The most straightforward measure of spread is the range, but it's not very useful because it tends to keep increasing as you sample more data. Variance and standard deviation are much better measures of spread. The...
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The standard deviation is a measure of the spread of scores within a set of data. Usually, we are interested in the standard deviation of a population. However, as we are often presented with data from a sample only, we can estimate the population standard deviation from a sample standard ...
You'll find two classifications to descriptive statistics in some pieces, and in some, you'll read about three. People can describe data in different ways. Below, we've classified descriptive statistics into four major types. Measures of central tendency A measure of central tendency also called...
Approach to OKRs at GitLab Being a public company Cadence E-Group offsite E-Group Weekly Family and Friends Day GitLab All-Company Meetings GitLab Culture All Remote A complete guide to the benefits of an all-remote company Adopting a self-service and self-learning mentality ...
First, we try to find the differences in travel behavior in the pre and post COVID-19 period. Second, we consider the user heterogeneity and study the preference of different groups to the customized bus services. Third, we provide constructive suggestions for managing the significant changes in...
Keywords with a high search volume and a low level of competition can bring you a quick (and substantial) return on your investment. But without an accurate measure of competition for a particular phrase or term, you simply don't get the full picture. ...
The color coding in option chains isn't standardized. While many platforms use green for calls and red for puts, always double-check the legend to avoid confusion. IV: A measure of the market's expectations of future price changes.3Comparing IV across different strikes and expirations provides...