In an accelerated life test, units are operated under extremeconditions until fa

Question

In an accelerated life test, units are operated under extremeconditions until failure. In one such test, 12 motors were operatedunder high temperatures conditions. The ambient temperatures (in C)and lifetimes (in hours) are presented in the followingtable: Temperature      Lifetime    40                     851    45                     635    50                     764    55                     708    60                     469    65                     661    70                     586    75                     371    80                     337    85                     245    90                     129    95                     158 b. Compute the least-squares line for predicting life-timefrom temperature. d. If the temperature is increased by 5 C, by how much wouldyou predict the lifetime to increase or decrease? e. Predict the lifetime for a temperature of 73 C. f. Should the least-squares line be used to predict thelifetime for a temperature of 120 C? If so, predict the lifetime.If not, explain why not. g. For what temperature would you predict a lifetime of 500hours? In an accelerated life test, units are operated under extremeconditions until failure. In one such test, 12 motors were operatedunder high temperatures conditions. The ambient temperatures (in C)and lifetimes (in hours) are presented in the followingtable: Temperature      Lifetime    40                     851    45                     635    50                     764    55                     708    60                     469    65                     661    70                     586    75                     371    80                     337    85                     245    90                     129    95                     158 b. Compute the least-squares line for predicting life-timefrom temperature. d. If the temperature is increased by 5 C, by how much wouldyou predict the lifetime to increase or decrease? e. Predict the lifetime for a temperature of 73 C. f. Should the least-squares line be used to predict thelifetime for a temperature of 120 C? If so, predict the lifetime.If not, explain why not. g. For what temperature would you predict a lifetime of 500hours?

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In an accelerated life test, units are operated under extremeconditions until fa

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