Change the Scale

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Reliability and Survival Methods • Life Distribution • Additional Examples of the Life Distribution Platform • Change the Scale

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Change the Scale

In the initial Compare Distributions report, the probability and time axes are linear. But suppose that you want to see distribution estimates on a Fréchet scale.¹

1.

Follow step 1 through step 5 in Example of the Life Distribution Platform.

2.

In the Compare Distributions report, select Fréchet in the Scale column.

3.

Select Interval Type > Pointwise from the red triangle menu.

Figure 2.17 Nonparametric Estimates with a Fréchet Probability Scale

Using a Fréchet scale, the nonparametric estimates approximate a straight line, meaning that a Fréchet fit might be reasonable.

4.

Select SEV in the Scale column.

The nonparametric estimates no longer approximate a straight line (Figure 2.18). You now know that the SEV distribution is not appropriate.

Figure 2.18 Nonparametric Estimates with a SEV Probability Scale

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Using different scales is sometimes referred to as drawing the distribution on different types of probability paper.

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Help created on 7/12/2018