In a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at 5 mph, and the resulting damage was estimated. Crashes were from three angles: head-on, slanted, and rear-end. The results are shown below.Research questions:Is the mean repair cost affected by crash type &/or vehicle type? Are the observed effects (if any) large enough to be of practical importance (as opposed to statistical significance)?

In a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at 5 mph, and the resulting damage was estimated. Crashes were from three angles: head-on, slanted, and rear-end. The results are shown below. Research questions: Is the mean repair cost affected by crash type and/or vehicle type? Are the observed effects (if any) large enough to be of practical importance (as opposed to statistical significance)? 5 mph Collision Damage ($) Crash Type Goliath Varmint Weasel Head-On 700 1, 700 2, 280 1, 400 1, 650 1, 670 850 1, 630 1, 740 Slant 1, 430 1, 850 2, 000 1, 740 1, 700 1, 510 1, 240 1 , 650 2, 480 Rear-end 700 860 1, 650 1, 250 1, 550 1, 650 970 1 , 250 1, 240 Click here for the Excel Data File (a-1) Choose the correct row-effect hypotheses. a. Ho: A] * A2 * A3 * 0 Angle means differ H1 : All the A; are equal to zero Angle means are the same b. HQ: A] - A2 - A3 = 0 Angle means are the same H1 : Not all the Aj are equal to zero - Angle means differ O a Ob(a-2) Choose the correct column-effect hypotheses. a. Ho: B] * B2 * B3 0 - Vehicle means differ H1 : All the By are equal to zero - Vehicle means are the same b. Ho : B1 - B2 - B3 = 0 - Vehicle means are the same H1 : Not all the B, are equal to zero - Vehicle means differ Oa Ob (a-3) Choose the correct interaction-effect hypotheses. a. Ho: Not all the ABj are equal to zero + there is an interaction effect H1 : All the ABjk are equal to zero - there is no interaction effect b. Ho: All the ABjk are equal to zero