Weibull Analysis: Results (Grouped Data)

Select variables via the Weibull & Reliability/Failure Time Analysis - Grouped data tab and click the OK button in the Weibull & Reliability/Failure Time Analysis dialog box to display the Weibull Analysis: Results (Grouped Data) dialog box, which contains three tabs: Quick, Estimate, and Reliability. Note that similar procedures for grouped data (life tables) are available in the Survival Analysis module.

Summary box

The Summary box at the top of the dialog box displays a summary of the parameters established so far in the analysis.

Copy button. Click the Copy button to copy either the selected text (if text has been selected) in the Summary box or all of the text (if no text has been selected) to the Clipboard. Note that the copied text retains formatting information (such as font, color, etc.).

Contract/Expand button Click the Contract/Expand button to contract or expand the Summary box. When contracted, you can see only one line of the Summary box text and can scroll through the text using a scroll bar. Note that when contracted the text is scrolled so that the first non-blank line is at the top. When expanded (the default setting), the entire Summary box will be displayed in the Multiple Correspondence Analysis Results dialog box.

Summary

Click the Summary button to produce a spreadsheet with the current parameter values. If the current parameter values are the maximum likelihood estimates (as estimated when the ML shape and scale parameters option button is selected in the Estimate parameters (weighted least squares) group box on the Estimate tab), the spreadsheet will also contain the standard errors and confidence intervals for the parameter estimates. Note that the confidence intervals are adjusted to reflect the fact that the valid parameter space is bounded (i.e., the shape parameter must be greater than 0). See Nelson (1990; Section 5.7) or Dodson (1994) for computational details.

Cancel

Click the Cancel button to close the dialog box without performing an analysis and return to the Weibull & Reliability/Failure Time Analysis dialog box.

Options

Click the Options button to display the Options menu.

By Group

 Click the By Group button to display the By Group specification dialog box.