更多"The probability of A is 0.4. The pr"的相关试题:
[单项选择]A probability function:（）
A. only applies to continuous distributions.
B. specifies the probability that the random variable takes on a specific value.
C. is often referred to as the "cdf. "
[单项选择]For an unconditional probability（）
A. there are at least two events.
B. the joint probability rule is important.
C. there is only one random variable of concern.
[单项选择]Use the following probability distribution to calculate the expected return for the portfolio.（）
A. 2.5%
B. 6.6%
C. 4.3%
[单项选择]After preparing the probability distribution of cost outcome for a project, the estimate, with a 15% probability of being exceeded, is approximately one standard deviation （）.
A. below the mean
B. above the median
C. above the mean
D. above the median
[单项选择]The probability of each of three independent events is shown in the table below. What is the probability of A and C occurring, but not B（）
A. 15%
B. 42%
C. 8.9%.
[单项选择]Which of the following is NOT a probability distribution（）
A. Flip a coin: P(H)=P(T)=0.5.
B. Roll an irregular die: P(1)=P(2)=P(3)=P(4)=0.2 and P(5)=P(6)=0.1.
C. Zeta Corp. : P(dividend increases)=0.60, P(dividend decreases)=0.30.
[单项选择]If two events are independent, the probability that they both will occur is:（）
A. 0.00.
B. 0.50.
C. Cannot be determined from the information given.
[单项选择]There is a 30 percent probability of rain this afternoon. There is a 10 percent probability of having an umbrella if it rains. What is the chance of it raining and having an umbrella（）
A. 33%.
B. 9%.
C. 3%.
[单项选择]If the probability of a Type I error decreases, then the probability of:（）
A. incorrectly rejecting the null increases.
B. a Type Ⅱ error increases.
C. incorrectly accepting the null increases.
[单项选择]Probability is the mathematical study of the {{U}}likelihood{{/U}} of an event’s occurrence.
A. predictability
B. fallibility
C. desirability
D. undeniability
[单项选择]Probability is the mathematical study of the ______ of an event's occurrence.
A. predictability
B. possibility
C. feasibility
D. undeniability
[单项选择]A joint probability of A and B must always be:（）
A. less than or equal to the conditional probability of A given B.
B. greater than or equal to the conditional probability of A given B.
C. C. greater than or equal to than the probability of A or
[单项选择]In your project，there is：25% probability for $25000 profit．50% probability for $40000 profit，25% probability for $100000 profit．What is the expected profit in your project
A. $40000．
B. $50000．
C. $51250．
D. $53750．
[单项选择]In your project，there is：50% probability for $40000 profit，50% probability for $25000 loss．What is the expected profit in your project
A. $32500．
B. $25000．
C. $7500．
D. -$7500( loss of $7500)．
[单项选择]每个TSRS主机柜要求（）路独立的不间断稳压AC220V电源，电压范围AC210V～AC230V，50Hz。
A. 1
B. 2
C. 3
D. 4
