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In: Mechanical Engineering

2. Two different hardening processes, (1) saltwater quenching and (2) oil quenching, are used on samples...

2. Two different hardening processes, (1) saltwater quenching and (2) oil quenching, are used on samples of a particular type of metal alloy. The results are shown in the table below. Assume that hardness is normally distributed. Test whether the variances are statistically different at 90% confidence. (10 pts)

Saltwater Quench

Oil Quench

145

154

150

152

153

149

148

157

141

142

152

148

146

160

154

154

153

145

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samet mamat answered 2 years ago
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