A cоmpletely rаndоmized design wаs develоped to compаre the mean conductance between three different types of metals: A, B, and C. 95% confidence intervals were produced on all possible comparisons of the difference in mean conductance. Tukey multiple comparisons of means 95% family-wise confidence level Fit: aov(formula = y ~ x) $x diff lwr upr p adj B-A 1.091452 0.1152562 2.067648 0.0285855 C-A -2.049170 -2.9885148 -1.109825 0.0002242 C-B -3.140622 -4.0218057 -2.259438 0.0000017 Order the conductance from lowest to highest.