School-Level Intraclass Correlation for Physical Activity in Adolescent Girls

Abstract
MURRAY, D. M., D. J. CATELLIER, P. J. HANNAN, M. S. TREUTH, J. STEVENS, K. H. SCHMITZ, J. C. RICE, and T. L. CONWAY. School-Level Intraclass Correlation for Physical Activity in Adolescent Girls. Med. Sci. Sports Exerc., Vol. 36, No. 5, pp. 876–882, 2004.Purpose:The Trial for Activity in Ado