Quadrilateral efgh is on a coordinate plane. segment fg is on the line 3x − y = −2, and segment eh is on the 3x − y = −6. which statement proves how segments fg and eh are related?
they have opposite reciprocals slopes of one third and −3 and are, therefore, perpendicular.
they have the same slope of negative one third and are, therefore, parallel.
they have opposite reciprocal slopes of negative one third and 3 and are, therefore, perpendicular.
they have the same slope of 3 and are, therefore, parallel.

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) ).