Individual Covariate - Cumulative Distribution Function

The cumulative distribution function graph displays two cumulative distributions:

1. One for previously marked animals that were known to be alive at the end of the selected period (i.e., recaptured at the end of the period or later) in blue.
2. One for those not known to be alive (i.e., captured for the last time prior to the selected period) in red.

The Kolmogorov-Smirnov test, or K-S test, tests the following:

• H₀: The two samples are from the same distribution.
• H_A: The two samples are from different distributions.

For the example above, the K-S test has a p-value of 0.0, indicating a significant difference in the two distributions. This may be due to some selective effect of length on survival , capture, or both .

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