Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN: 9780079039897
Author: Carter
Publisher: McGraw Hill
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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
 

 

(b) Fill in the missing data. (Round your table of means values to 1 decimal place, SS and F values to 2 decimal places, MS values to 3 decimal places, and p-values to 4 decimal places.)
 

Table of Means
 

Factor 2 (Vehicle)

Factor 1 (Angle) Goliath Varmint Weasel Total
Head-On        
Slant        
Rear-End        
Total        
 

 

Two-Factor ANOVA with Replication
Source SS df MS F p-value
Factor 1 (Angle)          
Factor 2 (Vehicle)          
Interaction          
Error          
Total      

 

(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 1 decimal place.)
 
Post hoc analysis for Factor 1:
 

Tukey simultaneous comparison t-values (d.f. = 18)
    Rear-End Head-On Slant
         
Rear-End        
Head-On        
Slant        
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    
 
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