概率（Probability）

题目

概率（Probability）

相似考题

1.Total Project Risk:A should not be calculated for small projectsB is the probability of each project risk event times the sum of the consequences of individual project risk events which could occur during the project.C Is the cumulative sum of the probability of each individual project risk event times the consequences of occurrence of that risk event.D A and BE A and C

2.To calculate the expected value of an outcome:A divide the value of each outcome by its probability, then add the results.B divide the value of the desired outcome by the value all possible outcomesC multiply the value of each outcome by its probability, then add the resultsD use linear regression to assess the expected value of the outcomeE B and D only

3.122 Total Project Risk:A. should not be calculated for small projectsB. is the probability of each project risk event times the sum of the consequences of individual project risk events which could occur during the project.C. Is the cumulative sum of the probability of each individual project risk event times the consequences of occurrence of that risk event.D. A and BE. A and C

4.A contractor estimates that a project has a 0.5 probability of $200,000 profit and 0.3 probability of $50,000 loss. The expected monetary value of this project is:A ￥200,000B ￥150,000C ￥85,000D ￥50,000E None of the above.

更多“概率（Probability）”相关问题

  • 第1题：

    (ii) Calculate the probability of the net profit being less than ￡75 million. (2 marks)


    正确答案：

  • 第2题：

    Whichofthefollowingtechniquesisusedfortrackingtheprojectrisks?()

    A.Probability-Impactmatrix

    B.Paretochart

    C.R-Chart

    D.PERT（ProgramEvaluationandReviewTechnique）analysis


    参考答案：A

  • 第3题：

    风险的优先级通常是根据（ ）设定。

    A.风险影响（Risk Impact）
    B.风险概率（Risk Probability）
    C.风险暴露（Risk Exposure）
    D.风险控制（Risk Control）

    答案：C
    解析：

  • 第4题：

    The more diverse knowledge one understands and actively absorbs, the probability of finding useful and _____discoveries.

    A.novel
    B.conventional
    C.rebellious
    D.narrative

    答案：A
    解析：
    本题考查形容词词义辨析。题目意为“一个人理解与积极地吸收的知识越多样化，就越有可能有有用和新奇的发现。”A项意为“新颖的、新奇的”。B项意为“传统的、惯例的”。C项意为“反抗的、造反的”。D项意为“叙事的、叙述的”。因此选A，新颖的发现。
    　　

  • 第5题：

    概率（Probability）


    正确答案:概率是指在长期中某种结果发生的次数与总次数之比。例如，如果多次掷骰子并且1点出现的次数是总次数的1／6，那么出现1点的概率就是1／6。

  • 第6题：

    The uncertainty of an event is measured by its probability of occurrence and is inversely proportional to that. The more uncertain an event is. The more information is required to resolve uncertainty of that event. The amount of information is measured in （）

    • A、possibility
    • B、bits
    • C、bps
    • D、probability

    正确答案:B

  • 第7题：

    生存概率(survival probability)


    正确答案:是指单位时间段开始时存活的个体到该时段结束时仍然存活的可能性。用p表示。

  • 第8题：

    单选题
    The probability that Claire passes chemistry is 0.75, and the probability that she passes history is 0.88. If passing one course is independent of passing the other, what is the probability that she does not pass chemistry and passes history?
    A

    0.22

    B

    0.66

    C

    0.13

    D

    0.25

    E

    0.03


    正确答案： A
    解析：
    The probability that Claire does NOT pass chemistry is 1-0.75=0.25. The probability that she does NOT pass chemistry and she does pass history is then 0.25×0.88 =0.22.

  • 第9题：

    问答题
    实证研究中所说的，显著性水平（significance level）和显著性概率（significance probability）分别指的是什么？

    正确答案： 估计总体参数落在某一区间内，可能犯错误的概率为显著性水平，用α表示。1-α为置信度或置信水平，表明了区间估计的可靠性。假设检验运用了小概率原理，事先确定的作为判断的界限，即允许的小概率的标准，称为显著性水平。如果根据命题的原假设所计算出来的概率小于这个标准，就拒绝原假设；大于这个标准则接受原假设。这样显著性水平把概率分布分为两个区间：拒绝区间，接受区间。而显著性概率是指的是样本与总体在某一参数上存在差异的概率。
    解析： 暂无解析

  • 第10题：

    单选题
    The fitting of an efficient radar reflector is likely to considerably increase the ship’s probability of（）.
    A

    detection

    B

    being detected

    C

    the detective

    D

    the detected


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    Which of these is a drawback in using McAfee heuristic scanning？（）
    A

     heuristic scanning cannot detect new malware with an unknown signature

    B

     heuristic scanning requires a separate license key

    C

     heuristic scanning increases the probability of false positives

    D

     heuristic scanning increases the probability of false negatives


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    The probability of guessing the correct answer to a certain test question is x/12. If the probability of NOT guessing the correct answer to this question is 2/3, what is the value of x?
    A

    2

    B

    3

    C

    4

    D

    6

    E

    12


    正确答案： A
    解析：
    You are given that the probability of guessing the correct answer to a certain test question is 1/3, so the probability of not guessing the correct answer is 1 - (x/12). Since the probability of NOT guessing the correct answer to this question is given as 2/3, 1-(x/12) = 2/3 or 1-(2/3) = x/12. So 1/3 = x/12. Hence, x = 4.

  • 第13题：

    The uncertainty of an event is measured by its probability of occurrence and is inversely proportional to that.The more uncertain an event is, the more inforamtion is required to resovle uncertainty of that event.The amount of information is measured in__(73)__. （73）

    A.possibility

    B.bits

    C.bps

    D.probability


    正确答案：B
    一个事件的不确定性是用它的出现概率来衡量的，而且二者是成反比的关系。事件的不确定性越高，就越是需要更多信息去解决它的不确定性。信息的数量是用比特来衡量的。

  • 第14题：

    They have the capability to destroy the enemy in a few days.

    A:possibility
    B:necessity
    C:ability
    D:probability

    答案：C
    解析：

  • 第15题：

    资料：In a survey,people were asked to choose between treatments to save 600 people from dying a disease.
    Participants,including physicians,were asked to choose between a certain outcome that 200 people will be saved and a risky choice where there is a one-third probability that 600 people will be saved and a two-thirds probability that no people will be saved.
    In a second example,the group were asked to choose between allowing 400 people to die or a one-third probably that nobody will die and two-thirds probability that 600 people will die.
    In both examples,the first choices have an identical outcome as do their second alternatives.But faced with such a grave choice people did not spot the similarities. In the first example people opted to save 200 people over the gamble of losing people and in the second example people preferred the gamble over the certain outcome of killing 400 people.
    What the experiment shows is that wording can have potentially dangerous consequences.Most of people tend to feel losses much more strongly than the pleasure of making a comparable gain.

    In the second example，more people choose the option（ ）？

    A.with a one-third probability that nobody will die
    B.with a two-thirds probability that nobody will be saved
    C.allowing 400 people to die
    D.that 200 people will be saved

    答案：A
    解析：
    本题考查的是细节理解。
    【关键词】second example；more people choose the option
    【主题句】in the second example people preferred the gamble over the certain outcome of killing 400 people.在第二个例子中，人们更倾向于冒险，而不是杀死400人的特定结果。
    【解析】本题的问题是“在第二个例子中，人们更倾向于哪个选择？”。根据原文可知，选项B以及选项D为第二个例子中的措辞，故排除B、D。（In a second example，the group were asked to choose between allowing 400 people to die or a one-third probably that nobody will die and two-thirds probability that 600 people will die.）结合主题句，“in the second example people preferred the gamble over the certain outcome of killing 400 people.在第二个例子中，人们更倾向于冒险，而不是杀死400人的特定结果。”故选A。

  • 第16题：

    The uncertainty of an event is measured by its probability of occurrence and is inversely proportional to that. The more uncertain an event is. The more information is required to resolve uncertainty of that event. The amount of information is measured in （ ） .

    A.possibility
    B.bits
    C.bps
    D.probability

    答案：B
    解析：
    一个事件的不确定性是由它发生的概率来计算的，并与之成反比关系，越是不确定的事件越需要更多的信息来解决该事件的不确定性，信息的数量由位来衡量的。A．可能性 B．位 C．bps D．概率

  • 第17题：

    实证研究中所说的，显著性水平（significance level）和显著性概率（significance probability）分别指的是什么？


    正确答案: 估计总体参数落在某一区间内，可能犯错误的概率为显著性水平，用α表示。1-α为置信度或置信水平，表明了区间估计的可靠性。假设检验运用了小概率原理，事先确定的作为判断的界限，即允许的小概率的标准，称为显著性水平。如果根据命题的原假设所计算出来的概率小于这个标准，就拒绝原假设；大于这个标准则接受原假设。这样显著性水平把概率分布分为两个区间：拒绝区间，接受区间。而显著性概率是指的是样本与总体在某一参数上存在差异的概率。

  • 第18题：

    DOE时在Minitab中有4种评估因子显著项的方法，以下哪个并非这4种方法之一？（）

    • A、正态概率图Normal probability plot
    • B、排列图Pareto plot
    • C、残差图Residual plot
    • D、利用假设检验的P值

    正确答案:C

  • 第19题：

    Which of these is a drawback in using McAfee heuristic scanning？（） 

    • A、 heuristic scanning cannot detect new malware with an unknown signature
    • B、 heuristic scanning requires a separate license key
    • C、 heuristic scanning increases the probability of false positives
    • D、 heuristic scanning increases the probability of false negatives

    正确答案:C

  • 第20题：

    名词解释题
    概率（Probability）

    正确答案： 概率是指在长期中某种结果发生的次数与总次数之比。例如，如果多次掷骰子并且1点出现的次数是总次数的1／6，那么出现1点的概率就是1／6。
    解析： 暂无解析

  • 第21题：

    单选题
    A die whose faces are numbered from l to 6 is rolled. Which of the following statements must be true?Ⅰ. The probability of getting a 4 on the top face is 2/3.Ⅱ. The probability of getting an odd number on the top face is 1/2.Ⅲ. The probability of getting a prime number on the top face is 1/2.
    A

    Ⅰand Ⅱ only

    B

    Ⅱ and Ⅲ only

    C

    Ⅰ and Ⅲ only

    D

    Ⅱ only

    E

    Ⅰ, Ⅱ, and IⅢ


    正确答案： E
    解析：
    There are total six different results when the die is rolled. Since any one of the six numbers many show up on the top face, the probability of getting a 4 on the top face is 1/6. Hence, Roman numeral Ⅰ is not true. Statement Ⅱ is true. Since there are three prime numbers, the probability is 3/6 or 1/2. Hence, Roman numeral Ⅲ is true.

  • 第22题：

    单选题
    DOE时在Minitab中有4种评估因子显著项的方法，以下哪个并非这4种方法之一？（）
    A

    正态概率图Normal probability plot

    B

    排列图Pareto plot

    C

    残差图Residual plot

    D

    利用假设检验的P值


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    Matt and Alysia are going to get their driver's licenses. The probability that Matt passes his driving test is 9/10. The probability that Alysia passes her driving test is 7/9. Assuming that their result is not dependent on how the other does, what is the probability that Matt passes and Alysia fails?
    A

    101/90

    B

    1/5

    C

    7/10

    D

    11/90

    E

    27/100


    正确答案： E
    解析：
    The two events are independent. The probability that Alysia fails the test is 1- 7/9 = 2/9 The probability that Matt passes and Alysia fails is (9/10)×(2/9) =2/10=1/5

  • 第24题：

    单选题
    These reactions increase the probability of incomplete combustion and are more likely to（）uncombusted and photochemically active hydrocarbon compounds into the atmosphere.
    A

    lease

    B

    release

    C

    please

    D

    relief


    正确答案： A
    解析： 暂无解析

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