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- From: DWINSLOW@UCS.INDIANA.EDU
- Newsgroups: bit.listserv.stat-l
- Subject: Mayfield statistics
- Message-ID: <STAT-L%92111816474754@VM1.MCGILL.CA>
- Date: 18 Nov 92 21:43:35 GMT
- Sender: "STATISTICAL CONSULTING" <STAT-L@MCGILL1.BITNET>
- Lines: 14
- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
-
- We have data on avian nest success for which we have calculated "Mayfield"
- statistics. This is basically the ratio of all of the nests lost divided
- by all of the nest-days for which the nests were active. That is, it is
- a proportion to describe the daily mortality (or 1-m = survivorship)
- for the population. Douglas Johnson (Auk 96:651-661) describes a method
- of estimating the variance of survivorship based on maximum likelihood
- estimation. He gives a test statistic to test the null hypothesis of
- no difference between daily survival rates (say, between two populations),
- but fails to mention which distribution to test it with. The test
- statistic is the difference between the survivorship values divided
- by the standard error of the difference.
-
- Anyone know what distribution to compare it with?
- Thanks, Donald (DWINSLOW@UCS.INDIANA.EDU)
-