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.Management Sciences
Category: RANDOM VARIABLE AND PROBABILITY DISTRIBUTIONS
The mathematical exception of x + y is equal to ________________?
0
A. E(x + 0)
B. E(x + x)
C. E(x) + E(y)
D. E(y)
A random variable is ____________ ?
A. Not a function
B. A continuous variable
C. A function
D. None of these
A continuous random variable which can assume all possible values on scale in a given _______________?
A. Interval
B. Point
C. Time
D. Sample space
The number of defective bulbs in a lot is example of ____________?
A. Continuous variable
B. Discrete variable
C. Function
D. None of these
For a probability density function (pdf), the probability of a single point is_____________?
A. 1
B. 2
C. 0
D. Constant
What is the probability that a ball drawn at random from a jar ?
A. 0.1
B. 1
C. 0.5
D. 0
E. Cannot be determined from given information
The variance of randomvariable of x then var(x) = E[x-E[x]2 = E[________]?
A. (X – A)2
B. E(x)
C. (x – u)2
D. (x – 4)2
Hourly temperature recorded by weather bureau is the example of ___________?
A. Discrete variable
B. Qualitative variable
C. Continuous variable
D. None of these
A random variable may be _____________?
A. fixed
B. continuous
C. discrete
D. discrete or continuous
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