Probit Analysis - Estimate
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Stat > Reliability/Survival > Probit Analysis > Estimate

You can estimate additional percentiles, survival probabilities, and cumulative failure probabilities. You can

·    estimate percentiles for the percents you specify. These percentiles are added to the default table of percentiles.

·    estimate survival probabilities for the stress values you specify.

·    estimate cumulative failure probabilities for the stress values you specify.

You can also change the method of estimation for the confidence intervals and the level of confidence.

Dialog box items

Estimate percentiles for these additional percents: Enter one or more percents or a column of percent values.

Estimate probabilities for these stress values: Enter one or more stress values or columns of stress values.

Estimate survival probabilities: Choose to estimate survival probabilities.

Estimate cumulative failure probabilities: Choose to estimate cumulative failure probabilities.

Confidence Intervals

Fiducial: Choose to display fiducial confidence intervals. This choice is the default.

Normal approximation: Choose to display confidence intervals obtained with a normal approximation.

Confidence level: Enter a confidence level for all of the confidence intervals. The default is 95%.

Confidence intervals: Choose to use two-sided confidence intervals (the default) or just an upper or lower confidence bound.