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प्रश्न
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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
विकल्प
Discrete value
Weighted value
Expected value
Cumulative value
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उत्तर
Expected value
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संबंधित प्रश्न
For the random variable X with the given probability mass function as below, find the mean and variance.
`f(x) = {{:((4 - x)/6, x = 1"," 2"," 3),(0, "otherwise"):}`
Two balls are drawn in succession without replacement from an urn containing four red balls and three black balls. Let X be the possible outcomes drawing red balls. Find the probability mass function and mean for X
Four fair coins are tossed once. Find the probability mass function, mean and variance for a number of heads that occurred
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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Demand of products per day for three days are 21, 19, 22 units and their respective probabilities are 0.29, 0.40, 0.35. Profit per unit is 0.50 paisa then expected profits for three days are
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Which of the following is not possible in probability distribution?
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A discrete probability distribution may be represented by
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E[X – E(X)] is equal to
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`int_(-oo)^oo` f(x) dx is always equal to
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If p(x) = `1/10`, x = 10, then E(X) is
