Four fabrics are tested for flammability at the National Bureau of Standards.  Burn times (in seconds) are recorded after a paper tab is ignited on the hem of a dress made of each fabric. ## Load the data from our course website (HW06_FabricData.csv) into a data frame named *FabricData*.  The burn times will be contained in the *BurnTime* variable of the data frame (FabricData\$BurnTime) and the conditions (i.e. fabric number) will be contained in the *Fabric* variable (FabricData\$Fabric). If F is significant, use RStudio to pe

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Four fabrics are tested for flammability at the National Bureau of Standards.  Burn times (in seconds) are recorded after a paper tab is ignited on the hem of a dress made of each fabric. ## Load the data from our course website (HW06_FabricData.csv) into a data frame named *FabricData*.  The burn times will be contained in the *BurnTime* variable of the data frame (FabricData\$BurnTime) and the conditions (i.e. fabric number) will be contained in the *Fabric* variable (FabricData\$Fabric).

If F is significant, use RStudio to perform a Tukey test of all pairs of means in the study.  Compute your values step-by-step (i.e. do not use the *TukeyHSD()* function) with $\alpha$ = .05. Report HSD, all pairwise mean differences, and interpret the results.

Perform a Scheffe test, comparing Fabric 4 to Fabrics 2 and 3 combined using rstudio.

Perform a Scheffe test, comparing Fabric 1 to Fabrics 2, 3, and 4 combined.

 

BurnTime Fabric
17.8 Fab1
16.2 Fab1
17.5 Fab1
17.4 Fab1
15 Fab1
11.2 Fab2
11.4 Fab2
15.8 Fab2
10 Fab2
10.4 Fab2
11.8 Fab3
11 Fab3
10
Fab3
9.2 Fab3
9.2 Fab3
14.9 | Fab4
10.8 | Fab4
12.8 | Fab4
10.7 | Fab4
10.7 | Fab4
Transcribed Image Text:BurnTime Fabric 17.8 Fab1 16.2 Fab1 17.5 Fab1 17.4 Fab1 15 Fab1 11.2 Fab2 11.4 Fab2 15.8 Fab2 10 Fab2 10.4 Fab2 11.8 Fab3 11 Fab3 10 Fab3 9.2 Fab3 9.2 Fab3 14.9 | Fab4 10.8 | Fab4 12.8 | Fab4 10.7 | Fab4 10.7 | Fab4
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