二维随机变量的数字特征 Flashcards

1
Q

如何求期望?(分为离散型随机变量、连续型随机变量两类)

A
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2
Q

如何求概率函数的期望?(分为离散型和连续型)

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3
Q

期望有什么性质?

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4
Q

方差的定义是什么?有什么推导?

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5
Q

如何计算方差?

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6
Q

方差有什么性质?

A
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7
Q

回忆常见离散型、连续型随机变量的期望和方差?

A
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8
Q

协方差的定义是什么?协方差的计算公式是什么?

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9
Q

协方差有什么性质?(3个)

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10
Q

eg:如何求相关系数?

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11
Q

eg:如何求相关系数?

A
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