Question

You're given the data below which shows the cost of operating 6 different Printing Machines per 100,000 pages copied.                                                                         

Machine	1	2	3	4	5	6	Sums	Means
Yi (cost)	85	120	70	125	125	90	Yi=615	Y = 102.5
Xi (pages)	9	13.5	5.5	8.5	15	8	Xi=59.5	X = 9.91667

                       

            The estimates of b₀ and b₁ are:

Variable	Coefficients	Std. Error
Intercept = b0	b0=52.11848	22.18407 = Sb0
Slope = b1	b1=5.080489	2.123631 = Sb1

            Using a T – Test, test H₀: b₁ = 0, vs H_A: b₁ ≠ 0 at α = .05. (2–tailed test).

Test the Significance of the Slope ONLY:

Set up the four Steps properly and carry them out.

Mean Square Error

Standard Error of the estimate

Sampling Distribution of b1

Estimated Standard Deviation of b1

T Test Test Stat (Reject or Accept)

F Test for significance in simple linear regression (Test Stat for F Test)

(Been stuck for hours S.O.S)

Answer 1