有限数学 示例

描述分布的两项属性 table[[x,P(x)],[1,-9],[2,-10],[3,-7],[4,0],[5,11],[6,26]]
解题步骤 1
取自独立值集合(例如 ……)的离散随机变量 。其概率分布将概率 赋值给每一个可能值 。对于每一个 ,概率 介于 (含)和 (含)之间,且所有可能 值的概率之和等于
1. 对每一个
2. .
解题步骤 2
is not greater than or equal to , which doesn't meet the first property of the probability distribution.
is not greater than or equal to
解题步骤 3
is not greater than or equal to , which doesn't meet the first property of the probability distribution.
is not greater than or equal to
解题步骤 4
is not greater than or equal to , which doesn't meet the first property of the probability distribution.
is not greater than or equal to
解题步骤 5
介于 (含)和 (含)之间,符合概率分布的第一个性质。
介于 (含)和 (含)之间
解题步骤 6
不小于或等于 ,即不符合概率分布的第一个性质。
不小于或等于
解题步骤 7
不小于或等于 ,即不符合概率分布的第一个性质。
不小于或等于
解题步骤 8
对于所有 值,概率 不介于 (含)和 (含)之间,即不满足概率分布的第一条性质。
该表不满足概率分布的两个性质