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प्रश्न
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A discrete probability distribution may be represented by
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संबंधित प्रश्न
If µ and σ2 are the mean and variance of the discrete random variable X and E(X + 3) = 10 and E(X + 3)2 = 116, find µ and σ2
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Four buses carrying 160 students from the same school arrive at a football stadium. The buses carry, respectively, 42, 36, 34, and 48 students. One of the students is randomly selected. Let X denote the number of students that were on the bus carrying the randomly selected student. One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on that bus. Then E(X) and E(Y) respectively are
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On a multiple-choice exam with 3 possible destructive for each of the 5 questions, the probability that a student will get 4 or more correct answers just by guessing is
What are the properties of Mathematical expectation?
What do you understand by Mathematical expectation?
The number of miles an automobile tire lasts before it reaches a critical point in tread wear can be represented by a p.d.f.
f(x) = `{{:(1/30 "e"^(- x/30)",", "for" x > 0),(0",", "for" x ≤ 0):}`
Find the expected number of miles (in thousands) a tire would last until it reaches the critical tread wear point
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Value which is obtained by multiplying possible values of a random variable with a probability of occurrence and is equal to the weighted average is called
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If X is a discrete random variable and p(x) is the probability of X, then the expected value of this random variable is equal to
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Which of the following is not possible in probability distribution?
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An expected value of a random variable is equal to it’s
