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4.11:章节解决方案(练习 + 作业)

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    205017
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    1

    \ (\ pageIndex {6}\) “>
    \(x\)\(P(x)\)
    00.12
    10.18
    20.30
    30.15
    40.10
    50.10
    60.05
    桌子\(\PageIndex{6}\)

    3

    0.10 + 0.05 = 0.15

    5

    1

    7

    0.35 + 0.40 + 0.10 = 0.85

    9

    1 (0.15) + 2 (0.35) + 3 (0.40) + 4 (0.10) = 0.15 + 0.70 + 1.20 + 0.40 = 2.45

    11

    \ (\ pageIndex {7}\) “>
    \(x\)\(P(x)\)
    00.03
    10.04
    20.08
    30.85
    桌子\(\PageIndex{7}\)

    13

    \(X =\)哈维尔每个月自愿参加的活动数量吧。

    15

    \ (\ pageIndex {8}\) “>
    \(x\)\(P(x)\)
    00.05
    10.05
    20.10
    30.20
    40.25
    50.35
    桌子\(\PageIndex{8}\)

    17

    1 — 0.05 = 0.95

    18

    \(X =\)样本中商科专业的数量。

    19

    2、3、4、5、6、7、8、9

    20

    \(X =\)回答 “是” 的号码

    22

    0、1、2、3、4、5、6、7、8

    24

    5.7

    26

    0.4151

    28

    \(X =\)从研究中选出的新生人数,直到有人回答 “是” 同性伴侣应有权获得合法婚姻状况。

    30

    1,2,...

    32

    1.4

    35

    0、1、2、3、4、...

    37

    0.0485

    39

    0.0214

    41

    \(X =\)每天死于机动车伤害的美国青少年人数。

    43

    0、1、2、3、4、...

    45

    不是

    48

    1. 50
      1. 53

        \(X =\)打电话声称患有流感、实际感染流感的患者人数。

        55

        0.0165

        57

        1. 59

          4. 4.43

          4

          63

          • 65
            1. 67
              1. 69
                1. 71
                  1. 73
                    1. \(\PageIndex{4}\)
                    2. 75
                      1. 77
                        1. 79

                          0、1、2 和 3

                          1. 82
                            1. 84

                              \(X =\)将缺陷灯泡的数量编成一串。

                              • 使用二项分布:
                                • 泊松近似值非常好——概率之间的差异很大\(0.0026\)

                                  86

                                  1. 88
                                    1. 90
                                      1. 92
                                        1. 94

                                          4


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