A study of the surface roughness of coated interior pipe used in oil fields resulted in the data below (measurements in micrometers). Conduct a nonparametric test to determine whether the median surface roughness of coated interior pipe differs from 2 micrometers. Test with 95% confidence. 1.72 2.50 2.16 2.13 2.57 2.64 1.26 2.05 1.06 1.19 2.24 2.31 2.13 1.27 2.03 1.51 1.09 2.41 1.40 1.95

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