n 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 ($) Crash Type Goliath Varmint Weasel Head-On 700 1,700 2,280 1,400 1,650 1,670 850 1,630 1,740 Slant 1,430 1,850 2,000 1,740 1,700 1,510 1,240 1,650 2,480 Rear-end 700 860 1,650 1,250 1,550 1,650 970 1,250 1,240 (d) Perform Tukey multiple comparison tests. (Input the mean values within the input boxes of the first row and input boxes of the first column. Round your t-values and critical values to 2 decimal places and other answers to 3 decimal places.)
In a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at 5 mph, and the resulting damage was estimated. Crashes were from three angles: head-on, slanted, and rear-end. The results are shown below. Research questions: Is the mean repair cost affected by crash type and/or vehicle type? Are the observed effects (if any) large enough to be of practical importance (as opposed to statistical significance)?
| 5 mph Collision Damage ($) | |||
| 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 | |
(d) Perform Tukey multiple comparison tests. (Input the
Post hoc analysis for Factor 1:
| Tukey simultaneous comparison t-values (d.f. = 18) | ||||
| Rear-End | Head-On | Slant | ||
| Rear-End | 1235.6 Numeric ResponseEdit Unavailable. 1235.6 correct. | |||
| Head-On | 1513.3 Numeric ResponseEdit Unavailable. 1513.3 correct. | |||
| Slant | 1733.3 Numeric ResponseEdit Unavailable. 1733.3 correct. | |||
| Critical values for experimentwise error rate: | ||||
| 0.05 | ||||
| 0.01 | ||||
Post hoc analysis for Factor 2:
|
Tukey simultaneous comparison t-values (d.f. = 18) |
||||
| Goliath | Varmint | Weasel | ||
| Goliath | ||||
| Varmint | ||||
| Weasel | ||||
| critical values for experimentwise error rate: | ||||
| 0.05 | ||||
| 0.01 | ||||
rev: 05_03_2019_QC_CS-167888
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