A. the intercept must also be positive B. the coefficient of determination can be either negative or positive, depending on the value of the slope C. the regression equation could have either a positive or a negative slope D. the slope of the line must be positive ...
A. a strong positive relationship B. a weak positive relationship C. a strong negative relationship D. no relationship 相关知识点: 试题来源: 解析 C。解析:相关系数接近 -1 表示强负相关,接近 1 表示强正相关,接近 0 表示关系较弱或没有关系。反馈...
某投资组合由资产A和资产B组成,两类资产的相关数据如下表所示。 投资组合的相关数据 资产A 资产B 投资比例 投资回报率的标准差 70% 0.46 30% 0.35 试根据上述信息解答问题。If the correlation coefficient is 0.82, what is the portfolio"s standard deviation A.41.2%B.54.6%C.67.8% 点击查看答案&解...
"r" correlation coefficient can only be in the range of -1 to +1. If the data obtained closer to +1, indicating that they have a strong positive correlation. On the contrary, if it is closer to -1, to prove that they have a strong negative correlation. There is a number equal to...
Even if the correlation coefficient is high (near +1) or low (near-1), it may not be significant. True or false? A. 正确 B. 错误 如何将EXCEL生成题库手机刷题 > 下载刷刷题APP,拍照搜索答疑 > 手机使用 分享 反馈 收藏 举报 参考答案: A 复制 纠错 举一反三 工作场所一氧化钛含量大于...
The correlation coefficient is positive because the covariance is positive. The fact that one or both variables have a negative mean does not affect the sign of the correlation coefficient. 【释义】相关系数为正,因为协方差为正。 一个或两个变量具有负均值这一事实不会影响相关系数的符号 反馈 收藏 ...
If the correlation coefficient is 0.8, the percentage of variation in the response variable explained by the variation in the explanatory variable is ( ).A.0.008B.0.8C.0.00D.0.的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜
a通过分析储蓄率与投资率的相关系数来分析资本的流动性,如果相关系数为零,资本完全流动,但如果相关系数接近或等于1,则资本流动性将大幅下降 Analyzes the capital through the analysis savings ratio and the rate of investment correlation coefficient the fluidity, if the correlation coefficient is a zero, the ...
The correlation coefficient between x and y is 0.6. If the variance of x is 225, th variance of y is 400, mean of x is 10 and mean of y is 20, find the equati
If the coefficient of correlation r = ± 1, then the best-fit linear equation will actually include all of the data points.A.正确B.错误的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为