From Table A.2 Ny = 10 X, = 32.76 x 107 x 2% 3.28 10% Nx ' Ax = 7.15 x 1078 Thus og = 0.28 x 10 Table A.2-—-DATA FROM INDENTER GAUGES Diameter, Diameter’ ax = Xi;-X (« 104) A& & 10°) 0.13 2.62 0.01 0.92 0.15 1.10 Island Gauge No. Bogallua 1 2 3 4 5 7 0.0171 0.0129 0.0179 0.0206 0.0170 0.0208 2.92 1.66 3.20 4.24 2.89 4.33 ~0.36 —-1.62 —0.08 0.96 ~ 0.36 1.05 10 21 0.0173 0.0154 2.99 2.37 —0.29 -0.91 8 9 in. (X;) « 10*) 0.0205 0.0199 4.20 3.96 0.92 0.68 0.85 0.46 0.08 0.83 Pa 4y=Y-Y Engebi (¥,) & 104) (&« 10*) ay & 10°) 11 12 13 0.0145 0.0182 0.0214 2.10 2.31 4.58 -1.15 ~ 0.94 1.33 1.32 0.88 1.77 15 0.0189 3.57 0.32 0.10 14 16 17 18 20 0.0214 4.58 0.0180 0.0168 0.0175 0.0174 3.24 2.76 3.06 3.03 1.33 ~0.01 ~0.45 —0.19 - 0.22 1.77 0.00 0.24 0.04 0.05 Likewise, using Yj to represent the square of the diameter for the other statistical set (readings from the gauges on Engebi), the standard deviation from the mean becomes og Vee Ly 0.20 x 10 = esby = ~4 Therefore X = (3.28 + 0.28) x 1074 and ¥ = (3.25 + 0.29) x 1074 66