Statistics

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 the Read more

GERALD J. LIEBERMAN Stanford University When a linear relationship has been fitted by least squares, the methods for securing a prediction interval for the response at some fixed value of the independent variable are explained in many statistical text books. This paper describes the somewhat more Read more

JOHN MANDEL National Bureau of Standards Washington, D. C. It frequently happens that data to be treated by regression methods or analysis of variance are subject to marked heterogeneity in the error variance. Weighting of the observations, in the least squares sense, is then appropriate but Read more

W. D. EWAN British Nylon Spinners Limited This paper reviews-and describes cumulative sum charts with special emphasis on the practical problems of successful application. Related PostsCumulative Sum ChartsE. S. PAGE University of Durham Computing Laboratory, Newcastle upon Tyne, England This Read more

M.B. WILK, R. GNANADESIKANAND M1ssM.J. HUYETT Bell Telephone Laboratories, Incorporated Murray Hill, New Jersey A procedure is presented for preparing probability plots for random samples from an assumed gamma distribution for any specified value of the shape parameter, 7. Computational Read more