J. L. DOLBY* Lockheed Aircraft Corporation. Thii report provides a simple graphical procedure for obtaining the slope and intercept, of the straight line of best fit to a set of points in two dimensions. The solution is obtained in the dual space (coordinate system) by use of mapping. Although Read more
G.E.P.Box AND D.W. BEHNKEN University of Wisconsin and the American Cyanamid Company. A class of incomplete three level factorial designs useful for estimating the coefficients in a second degree graduating polynomial are described. The designs either meet, or approximately meet, the criterion of Read more
R. C. BOSE, I. M. CHAKRAVARTI AND D. E. KNTJTH University of North Carolina and Case Institute of Technology. This paper deals with the problem of finding sets of mutually orthogonal Latin squares of order 4t (where 4t - 1 is a prime power) based on orthogonal mappings of a group. For the group G Read more
G. P. PATIL Indian Statistical Institute and The University oj Michigan. The Negative Binomial Distribution is a frequently encountered standard discrete distribution function. By the use of the available Binomial or Incomplete Beta Function tables it can be evaluated easily through the use of Read more
ALFRED WEISSBERG** AND GLENN H. BEATTY Battelle Memorial Institute. Tables of factors for use in computing two-sided tolerance limits are presented. In contrast to previous tabulations of the tolerance-limit factor K, we tabulate the factors r(N, P) and u(f, y), whose product is equal to K. Read more