The accompanying data resulted from a flammability study in which specimens of five different fabrics were tested to determine burn times.

17.8 16.2 15.9 15.5 213.2 10.4 11.3 Fabric 311.8 11.0 9.2 10.0 416.5 15.3 14.1 15.0 13.9 5 13.9 10.8 12.8 11.7 MSTr 23.67 MSE 1.39 F 17.08 P-value .000 The accompanying output gives the T-K intervals as calculated by Minitab. Identify significant differences and give the underscoring pattern.

Individual error rate = 0.00750 Critical value = 4.37 Intervals for (column level mean) - (row level mean)

1 2 34 1.938 2 7.495 3.278 -1.645 3 8.422 3.912

-1.050 -5.983 -6.900 4 3.830 -0.670 -2.020 1.478 -3.445 -4.372 0.220 5 6.622 2.112 0.772 5.100