Other
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.313..159r&link_type=abstract
Nature (ISSN 0028-0836), vol. 313, Jan. 10, 1985, p. 159; Reply, p. 159, 160.
Other
5
Earth (Planet), Extinction, Galactic Structure, Planetary Mass, Correlation Coefficients
Scientific paper
A criticism of a statistical argument by Rampino and Stothers (1984) favoring a 'galactic plane crossing; explanation for terrestrial extinctions is presented, and Rampino and Stothers reply. Rampino and Stothers found a significant correlation coefficient between the dates of mass extinctions and the dates of galactic plane crossings and also found significant results when applying Student's t-test for matched pairs to these numbers. Stigler points out that the correlation of any two monotonically increasing sequences is bound to be high and argues that the t-test was conducted in a biased way. Rampino and Stothers reply that their first correlation is too high to be accounted for by a correlation of monotonically increasing sequences, and argue that their application of the t-test is valid.
Rampino Michael R.
Stothers Richard B.
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