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Comment
.2015 Mar;298(3):489-93.
doi: 10.1002/ar.23101. Epub 2014 Nov 22.

Problems in Erickson et al. 2009

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Comment

Problems in Erickson et al. 2009

Nathan P Myhrvold. Anat Rec (Hoboken).2015 Mar.
No abstract available

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Figures

Figure 1
Figure 1
A plot of Erickson et al.'s best fit equation, given in the caption of Figure 6 in Erickson et al. 2009, as well as the published and recovered data sets and two of my regression attempts, overlaid on top of the suspect figure. Erickson et al.'s best fit curve according to the caption published with Figure 6 matches neither the plotted best fit curve nor any of my attempted regressions. The recovered data set which I used in my reanalysis, plotted as yellow points, shows close correspondence with the data set as plotted. Comparing the published data set with the recovered data set, it is clear that many of the original data points were not plotted in the published figure, and others appear to have been plotted inaccurately. The source of the data set as published, the best fit regression curve, and the regression curve as plotted are unknown.
See this image and copyright information in PMC

Comment in

  • Flawed Analysis? A Response to Myhrvold.
    Erickson GM, Makovicky PJ, Inouye BD, Zhou CF, Gao KQ.Erickson GM, et al.Anat Rec (Hoboken). 2015 Oct;298(10):1669-72. doi: 10.1002/ar.23187. Epub 2015 Jul 30.Anat Rec (Hoboken). 2015.PMID:26097068No abstract available.

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References

    1. American Statistical Association Committee on Professional Ethics. 1999. . Ethical guidelines for statistical practice. Available at:http://www.amstat.org/about/ethicalguidelines.cfm.
    1. Erickson GM, Currie PJ, Inouye BD, Winn AA. Tyrannosaur life tables: an example of nonavian dinosaur population biology. Science. 2006;313:213–217. - PubMed
    1. Erickson GM, Makovicky PJ, Currie PJ, Norell MA, Yerby SA, Brochu CA. Gigantism and comparative life-history parameters of tyrannosaurid dinosaurs. Nature. 2004;430:772–775. - PubMed
    1. Erickson GM, Makovicky PJ, Inouye BD, Zhou C-F, Gao K-Q. A life table for Psittacosaurus Lujiatunensis: initial insights into ornithischian dinosaur population biology. Anat Rec. 2009a;292:1514–1521. - PubMed
    1. Erickson GM, Makovicky PJ, Inouye BD, Zhou C-F, Gao K-Q. Erratum. Anat Rec. 2009b;292:1684–1684. - PubMed

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