![]() ![]() The probability plot is saying that at a voltage of 113.25, 10% of your items are failing. This can be seen here, at the 10 th percentile: Now, this may seem like an easy question, given that the probabilities on a survival plot are simply 1 minus the failure probabilities on a probability plot at a specific time t or stressor (in the case of Probit Analysis, used for our example below). Is there a one-to-one match between the confidence interval points on a probability plot and the confidence interval points on survival plot at a specific percentile? I recently fielded an interesting question about the probability and survival plots in Minitab Statistical Software's Reliability/Survival menus:
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