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प्रश्न
If X has a Poisson distribution with variance 2, find
Mean of X [Use e-2 = 0.1353]
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उत्तर
Mean = Variance = 2
∴ Mean= 2
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संबंधित प्रश्न
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Solution: Since P(X = 1) = P(X = 2)
∴ `("e"^square"m"^1)/(1!) = ("e"^"-m""m"^2)/square`
∴ m = `square`
∴ P(X = 2) = `("e"^-2. "m"^2)/(2!)` = `square`
