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【判断题】
某地某传染病的发病人数可视为二项分布。()
A.
正确
B.
错误
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参考答案：
举一反三
【单选题】(B) What Is World English World English is a course in the English language. It is intended for students whose native language is not English. It is a basic programme consisting of six s...
A.
Books One and Two
B.
Books Three and Four
C.
Books Five and Six
D.
none of them
【多选题】设随机变量X服从二项分布b(16，0．9)，则下列计算结果中，正确的有( )。
A.
E(X)=1．6
B.
E(X)=14．4
C.
d(X)=1．44
D.
d(X)=1．2
E.
Var(X)=1．44
【单选题】What is World English World English is a course in the English language. It is intended for students whose native lauguage is not English. It is a basic programme consisting of six stages. Each stage ...
A.
What is World English
B.
World English is a course in the English language. It is intended for students whose native lauguage is not English. It is a basic programme consisting of six stages. Each stage includes a Student Book, a Teacher’s Book, a Workbook, and cassette recordings. World English is further supported by separate books of readings, by tests, and by visual (可视的) aids.
C.
Who is World English for
D.
World English may be entered at any one of three different levels. The First Level, Books One and Two, is intended for students with little or no education in English. Books Three and Four make up the Second Level; they are suitable for students who have some knowledge of English. The Third Level, Books Five and Six, is intended for students who are concerned with improvement in the language.
E.
What does World English teach
F.
World English teaches four basic skills of language: listening, speaking, reading, and writing. At all levels, each skill is presented systematically. In the First Level, listening and speaking receive more attention. In the latter books, reading and writing become more important. However, reading and writing activities are presented even in Unit One of Book One; and listening and speaking exercises occur through Unit Ten of Book Six.
【多选题】二项分布的随机现象，它满足的条件包括( )。
A.
重复进行n次随机试验
B.
n次试验间相互独立
C.
每次试验仅有两个可能结果，且成功的概率为P，失败的概率为1-p
D.
每次试验前的结果是已知的
E.
每次试验结果不定，但有3个可能结果
【单选题】设X服从二项分布，EX=2.4，DX=1.44，则二项分布的参数为（）.
A.
n=6，p=0.4
B.
n=6，p=0.1
C.
n=8，p=0.3
D.
n=24，p=0.1
相关题目：
【单选题】(B) What Is World English World English is a course in the English language. It is intended for students whose native language is not English. It is a basic programme consisting of six s...
A.
Books One and Two
B.
Books Three and Four
C.
Books Five and Six
D.
none of them
【多选题】设随机变量X服从二项分布b(16，0．9)，则下列计算结果中，正确的有( )。
A.
E(X)=1．6
B.
E(X)=14．4
C.
d(X)=1．44
D.
d(X)=1．2
E.
Var(X)=1．44
【单选题】What is World English World English is a course in the English language. It is intended for students whose native lauguage is not English. It is a basic programme consisting of six stages. Each stage ...
A.
What is World English
B.
World English is a course in the English language. It is intended for students whose native lauguage is not English. It is a basic programme consisting of six stages. Each stage includes a Student Book, a Teacher’s Book, a Workbook, and cassette recordings. World English is further supported by separate books of readings, by tests, and by visual (可视的) aids.
C.
Who is World English for
D.
World English may be entered at any one of three different levels. The First Level, Books One and Two, is intended for students with little or no education in English. Books Three and Four make up the Second Level; they are suitable for students who have some knowledge of English. The Third Level, Books Five and Six, is intended for students who are concerned with improvement in the language.
E.
What does World English teach
F.
World English teaches four basic skills of language: listening, speaking, reading, and writing. At all levels, each skill is presented systematically. In the First Level, listening and speaking receive more attention. In the latter books, reading and writing become more important. However, reading and writing activities are presented even in Unit One of Book One; and listening and speaking exercises occur through Unit Ten of Book Six.
【多选题】二项分布的随机现象，它满足的条件包括( )。
A.
重复进行n次随机试验
B.
n次试验间相互独立
C.
每次试验仅有两个可能结果，且成功的概率为P，失败的概率为1-p
D.
每次试验前的结果是已知的
E.
每次试验结果不定，但有3个可能结果
【单选题】设X服从二项分布，EX=2.4，DX=1.44，则二项分布的参数为（）.
A.
n=6，p=0.4
B.
n=6，p=0.1
C.
n=8，p=0.3
D.
n=24，p=0.1
参考解析：
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