百度试题 结果1 题目37.设随机变量X～N(μ1,o),Y～N(μ2,),且两者相互独立.试求Var(aX-bY)的值其中a,b是常数. 相关知识点: 试题来源: 解析 解析: Var(ax-bh)=a^2var(x)+b^2v_0x(Y)=a^2δ_1^2+b^26_2^2 反馈 收藏
百度试题 结果1 题目37.设随机变量 X∼N(μ_1,σ_1^2,Y∼N(μ_2,σ_2) ,且两者相互独立.试求 Var(aX -bY)的值,其中 a,b是常数. 相关知识点: 试题来源: 解析 37.a2o+b2o. 反馈 收藏
若随机变量X与Y相关系数为r,且var[X]和var[Y]已知。问:var[aX+bY]为多少(a,b为常数)? 下载作业帮APP学习辅导没烦恼 答案解析 结果1 举报 a²Var(X)+b²Var(Y)+2abr·√[Var(X)]·√[Var(Y)] APP内打开 热点考题 2022年高考真题试卷及分析报告 397206 高考复习之挑战压轴题300题 249027 菁优...
设有两个随机变量 X 和 Y，它们的方差分别为 Var(X) 和 Var(Y)。考虑线性组合 Z = aX + bY，其中 a 和 b 是常数。线性组合的方差计算公式为：Var(Z) = a^2 * Var(X) + b^2 * Var(Y) + 2ab * Cov(X, Y)其中，Var(Z) 表示线性组合 Z 的方差；a 和 b 是常数，表示线性...
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Compute the covariance and correlation between aX + bY and cX + dY, for real numbers a, b, c, d and independent N(0,1) variables X, Y. Suppose you fit a least squares line to 24 data points and the calculated value of SSE is 8.01. A. F...
Suppose X is random variable, a and b are constants. Use the definition to prove: Var (aX + b) = a^2 Var(X) Express var(X + Y), var(X - Y), and cov(X + Y, X - Y) in terms of the variances and covariances of X and Y. ...
Applies To:Microsoft Dynamics AX 2012 R3, Microsoft Dynamics AX 2012 R2, Microsoft Dynamics AX 2012 Feature Pack, Microsoft Dynamics AX 2012 TheVAR layer runtimelicense code permits a user to install a model in the VAR layer. Configuration keys enabled by this license code ...
ax = fig.add_subplot(projection='3d') ax.plot(example_sol.y[0,:], example_sol.y[1,:], example_sol.y[2,:], color='k', linewidth=1, label='Actual Solution') ax.plot(np.sqrt(beta*(rho - 1)), np.sqrt(beta*(rho - 1)), rho-1, 'o', markersize=3, color='r') ax.plot...
dmitryax merged 1 commit into open-telemetry:main from rockdaboot:elasticsearchexporter-copyloopvar Dec 14, 2024 Merged [exporter/elasticsearch][chore]: Fix copyloopvar issues #36801 dmitryax merged 1 commit into open-telemetry:main from rockdaboot:elasticsearchexporter-copyloopvar Dec 14, 20...