In an experiment to ascertain the eect of load, x, in
Chapter 12, Problem 12.61(choose chapter or problem)
In an experiment to ascertain the eect of load, x, in lb/inches2, on the probability of failure of specimens of a certain fabric type, an experiment was conducted in which numbers of specimens were exposed to loads ranging from 5 lb/in.2 to 90 lb/in.2. The numbersof failures were observed. The data are as follows: Number of Number of Load Specimens Failures 5 35 70 80 90 600 500 600 300 300 13 95 189 95 130 (a) Use logistic regression to t the modelp =1 1+e(0+1x),where p is the probability of failure and x is load. (b) Use the odds ratio concept to determine the increase in odds of failure that results by increasing the load from 20 lb/in.2.
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