Suppose that Y is a discrete random variable with mean μ and variance σ 2 and let X = Y + 1.a Do you expect the mean of X to be larger than, smaller than, or equal to μ = E (Y )?Why?b Use Theorems 3.3 and 3.5 to express E ( X ) = E (Y + 1) in terms of μ = E (Y ).Does thisresult agree with your answer to part (a)?c Recalling that the variance is a measure of spread or dispersion, do you expect the varianceof X to be larger than, smaller than, or equal to σ2= V (Y )?Why?
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