The coefficient of variation (COV) is the ratio of the standard deviation of a data set to the expected mean. Investors use it to determine whether the expected return of the investment is worth the degree of volatility, or the downside risk, that it may experience ov...
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What Does a Correlation Coefficient of Zero Mean? A correlation coefficient of zero indicates the absence of a relationship between the two variables being studied. It's impossible to predict if or how one variable will change in response to changes in the other variable if they both have a c...
百度试题 题目What is the coefficient of variation for a distribution with a mean of 10 and a variance of 4? A. 20%. B. 40%. C. 25%. 相关知识点: 试题来源: 解析 A 略 反馈 收藏
答案解析: Coefficient of variation, CV = standard deviation / mean. The standard deviation is the square root of the variance, or 4½ = 2. So, CV = 2 / 10 = 20%. 统计:共计66人答过,平均正确率62.12% 问题:进入高顿部落发帖帮助...
If f(y) = 2y/k^{(2)} , 0 \leq y is less than k for what value of k does Var(Y) = 2? What does the coefficient of determination of 0.81 mean? Interpret the coefficient for x_2. Determine the coefficient of determination and explain what this means. ...
In this episode we speak with Laura Compean about the common struggle educators face when designing and facilitating a math support class to help students who have traditionally struggled with mathematics. How can we build a welcoming classroom culture t
Letnnbe the population size,xxandyytwo different features (variables), andμμthe population mean; the covariance can then be formally defined as: σxy=1n∑in(x(i)−μx)(y(i)−μy).σxy=1n∑in(x(i)−μx)(y(i)−μy). ...
Reliability: A psychometric term for the repeat-ability or consistency of the measurement process. Often, this is indexed by a single number, most commonly the internal consistency index coefficient alpha or its dichotomous formulation, KR-20. Under most conditions, these range from 0.0 to 1.0, ...
Graphical representations of speech generate powerful computational measures related to psychosis. Previous studies have mostly relied on structural relations between words as the basis of graph formation, i.e., connecting each word to the next in a sequ