20. The article Compatibility of Outer and Fusible Interlining Fabrics in Tailored Garments (Textile Res. J., 1997: 137—142) gave the following observations on bending rigidity (mN # m) for mediumquality fabric specimens, from which the accompanying MINITAB output was obtained:

24.6 12.7 14.4 30.6 16.1 9.5 31.5 17.2 46.9 68.3 30.8 116.7 39.5 73.8 80.6 20.3 25.8 30.9 39.2 36.8 46.6 15.6 32.3 Would you use a one-sample t con dence interval to estimate true average bending rigidity? Explain your reasoning.