•using the following 3 equations, answer the questions:
11x + y = 4
x + y = - 2
x – 2y = 18
• how can you determine which equations can be graphed more easily using
x- and y-intercepts, rewriting in slope-intercept form, or using a table of
values?
• which method works best for you personally? when does it not work as
well?

Consider the linear model for a two-stage nested design with b nested in a as given below. yijk=\small \mu + \small \taui + \small \betaj(i) + \small \varepsilon(ij)k , for i=1,; j= ; k=1, assumption: \small \varepsilon(ij)k ~ iid n (0, \small \sigma2) ; \small \taui ~ iid n(0, \small \sigmat2 ); \tiny \sum_{j=1}^{b} \small \betaj(i) =0; \small \varepsilon(ij)k and \small \taui are independent. using only the given information, derive the least square estimator of \small \betaj(i) using the appropriate constraints (sum to zero constraints) and derive e(msb(a) ).