whittermore {DCluster}

Whittermore's Statistic

Description

Whittermore's statistic is defined as follows:

W=\frac{n-1}{n}r^{'} D r

where r^{'}=[O_1/O_+, \ldots, O_n/O_+] and D is a distance matrix between the centroids of the areas.

It can be used to assess whether the region under study tends to cluster or not.

References

Whittermore, A. S. and Friend, N. and Byron, W. and Brown, J. R. and Holly, E. A. (1987). A test to detect clusters of disease. Biometrika 74, 631-635.

See Also

DCluster, whittermore.stat, whittermore.boot, whittermore.pboot