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प्रश्न
Choose the correct alternative:
An expected value of a random variable is equal to it’s
विकल्प
variance
standard deviation
mean
con variance
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उत्तर
mean
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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) = {{:(1/2 "e"^(x/2), "for" x > 0),(0, "otherwise"):}`
The probability density function of the random variable X is given by
`f(x) = {{:(16x"e"^(-4x), x > 0),(0, x ≤ 0):}`
find the mean and variance of X
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Let X be a random variable and Y = 2X + 1. What is the variance of Y if variance of X is 5?
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Which of the following is not possible in probability distribution?
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E[X – E(X)]2 is
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`int_(-oo)^oo` f(x) dx is always equal to
