As noted in Problem 15-21, wire bond pull strengths for U.S. defense contractors are tested according to MIL-STD-883. In addition to nondestructive testing, destructive testing is also employed. A small potentiometer measures the grams of force necessary to either shear the wire in two or separate one of the two bonds from the underlying substrate. Ten samples

(n = 5 ) of V. S. Industries’ 1 mil diameter Au wire have shown these results for force: 2.1, 2.2, 2.6, 2.1, 2.5, 2.4, 2.3, 2.1, 2.4, and 2.6 grams. Determine 99.7% control limits for the associated x-bar and R-charts.