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A Central t Approximation to the Noncentral t Distribution
Helena Chmura Kraemer and Minja Paik
Vol. 21, No. 3 (Aug., 1979), pp. 357-360
Published by: Taylor & Francis, Ltd. on behalf of American Statistical Association and American Society for Quality
Stable URL: http://www.jstor.org/stable/1267759
Page Count: 4
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A central t-distribution approximation to the noncentral t distribution is suggested which is quite accurate even for moderate values of degrees of freedom, and is a more accurate approximation than is the normal approximation for small values of the noncentrality parameter δ.
Technometrics © 1979 American Statistical Association