© 1974 by Biometrika Trust
New approximations to the distribution of certain angular statistics
School of Mathematics, University of Newcastle upon Tyne
*Now at Department of Mathematics, University of Essex, Colchester
This paper provides improved normal approximations to the von Mises distribution. New adjustments for certain chi-squared approximations to the distributions of the two useful angular statistics X and R are introduced. These are compared with the existing adjustments.
Key Words: Chi-squared approximations Directions Normal approximations Resultant vector von Mises distribution