Blueprint 4 Workbook Answer Key 【iPad High-Quality】

[ t = \frac\barx_A - \barx_BSE = \frac

(t_calc= -2.13,; df\approx 22,; p\approx0.045) → Reject (H_0); the means differ at the 5 % level. blueprint 4 workbook answer key

[ \beginbmatrixx\y\endbmatrix=A^-1\mathbfb= \frac122 \beginbmatrix 4 & 2\ -5 & 3 \endbmatrix \beginbmatrix7\-1\endbmatrix =\frac122\beginbmatrix 4(7)+2(-1)\ -5(7)+3(-1) \endbmatrix =\frac122\beginbmatrix 28-2\ -35-3 \endbmatrix =\frac122\beginbmatrix 26\ -38 \endbmatrix ] [ t = \frac\barx_A - \barx_BSE = \frac (t_calc= -2

(x = 1,\qquad y = -1)

[ A = \beginbmatrix 3 & -2\ 5 & 4 \endbmatrix,\quad \mathbfb = \beginbmatrix7\-1\endbmatrix ] p\approx0.045) → Reject (H_0)

The problem tests ability to (a) manipulate linear equations, (b) recognize when elimination yields fractional results, and (c) apply matrix inversion as an alternative verification.

(5.6\ \textkW·h=2.016\times10^7\ \textJ)