In the Materials and Methods, sub-section headed Statistical analysis, the two equations given are not correct. They should read:
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20160329070010691-0450:S0021859613000051_eqnU1.gif?pub-status=live)
and
![](https://static.cambridge.org/binary/version/id/urn:cambridge.org:id:binary:20160329070010691-0450:S0021859613000051_eqnU2.gif?pub-status=live)
22 August 2024: Due to technical disruption, we are experiencing some delays to publication. We are working to restore services and apologise for the inconvenience. For further updates please visit our website: https://www.cambridge.org/universitypress/about-us/news-and-blogs/cambridge-university-press-publishing-update-following-technical-disruption
Published online by Cambridge University Press: 11 February 2013
In the Materials and Methods, sub-section headed Statistical analysis, the two equations given are not correct. They should read:
and