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

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 17.8 16.2 15.9 15.5 2 13.2 10.4 11.3 Fabric 3 11.8 .0 9.2 10.0 4 16.5 15.3 14.1 15.0 13.9 5 13.9 10.8 12.8 11.7 3 4 2 7.495 3 8.422 3.912 4 3.830 0.670 -2.020 5 6.622 2.112 0.772 5.100 1.938 3.278 1.645 1.050 5.983 -6.900 1.478 3.445 -4372 0.220