1.
Let the observations xix_i (1≤i≤101 \leq i \leq 10) satisfy ∑i=110(xi−5)=10\sum_{i=1}^{10}(x_i-5)=10, ∑i=110(xi−5)2=40\sum_{i=1}^{10}(x_i-5)^2=40. If μ\mu and λ\lambda are the mean and variance of x1−3,x2−3,…,x10−3x_1-3, x_2-3, \ldots, x_{10}-3, then the ordered pair (μ,λ)(\mu, \lambda) is