Statistics

Let the observations x_i (1 $\le$ i $\le$ 10) satisfy the equations, $\sum\limits_{i = 1}^{10} {\left( {{x_1} - 5} \right)}$ = 10 and $\sum\limits_{i = 1}^{10} {{{\left( {{x_1} - 5} \right)}^2}}$ = 40. If $\mu$ and $\lambda$ are the mean and the variance of the observations, x₁ – 3, x₂ – 3, ...., x₁₀ – 3, then the ordered pair ($\mu$, $\lambda$) is equal to :