To make a distribution ID plot (uncensored/right-censored data)
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1    Choose Stat > Reliability/Survival > Distribution Analysis (Right Censoring) > Distribution ID Plot.

2    In Variables, enter the columns of failure times. You can enter up to 50 columns (50 different samples).

3    If you have frequency columns, enter the columns in Frequency columns.

4    If all of the samples are stacked in one column, check By variable, and enter a column of grouping indicators in the box.

5    Do one of the following:

·    Choose Use all distributions to create probability plots for all eleven distributions.

·    Choose Specify to create up to four probability plots with the distributions of your choice.

6    Click Censor.

7    Do one of the following, then click OK.

·    For data with censoring columns: Choose Use censoring columns, then enter the censoring columns in the box. The first censoring column is paired with the first data column, the second censoring column is paired with the second data column, and so on.

If you like, enter the value you use to indicate censoring in Censoring value. If you do not enter a value, Minitab uses the lowest value in the censoring column.

·    For time censored data: Choose Time censor at, then enter a failure time at which to begin censoring. For example, entering 500 says that any observation from 500 time units onward is considered censored.

·    For failure censored data: Choose Failure censor at, then enter a number of failures at which to begin censoring. For example, entering 150 says to make all (ordered) observations starting with the 150th observation censored, and all other observations uncensored.

8    If you like, use any of the available dialog box options, then click OK.