1(2). TRUE/FALSE: The daily milk production in one farm has a mean of five gallons and variance of 0.8. Randomly select 15 days, and record the daily milk production. Then the 15 days sample mean milk production follows normal distribution with mean five gallons and variance of (ig. |:|. 2(2). TRUE/FALSE: LetX ~ Poisson(5), then P(X 2 1) = 1 P(X S 1). |:|. 3(2). For a discrete random variable X, we know that P(X = 10) = 0.4, P(X = 20) = 0.6, then E(X2) = l