Problem#1:Plotting a Weibull with suspensions

Produce a Weibull plot based on the following data:

Note the differences between the two plots.

1. Use Median Ranked Regression (MRR),

2. then Maximum Likelihood Estimates (MLE).

Failure Time

(cycles) Status

1500 Failure

1750 Suspension

2250 Failure

4000 Failure

4300 Failure

5000 Suspension

7000 Failure

Step by Step

Open WinSMITH Weibull Student

Version (WSWS): double click the icon

on the desktop or go to Start-->

Programs-->Supersmith Weibull

Input the data, using a negative sign for

suspensions. Or you can cut and paste

from EXCEL.

Inputting data to SuperSMITH

Then click on the paste

bottle graphic.

Notice that the suspensions that were put in as a negative

numbers show up as a >1750 and >5000

After a few seconds, SuperSMITH automatically produces

your Weibull plot

Now, click on Labels

to put your titles on the plot

Type in your title and click the green check

Do the same for the y-axis title, and put your initials in

Customize your plot with titles

Finally, click

Exit

Click here to put a

label on the plot