국내 최대 기계 및 로봇 연구정보

공학설계D/B

공학설계D/B 게시판 내용
Volume Title	Structures
Volume No	Organisational documents. General data - principal stress strains, yielding, inelastic stress/strain curve, introduction to statistics, Normal distribution. Section constants - shear centre, warping constants, flexural properties, stress distribution in shells under bending.
DATA Title	The statistical analysis of data from Normal distributions, with particular reference to small samples.
DATA Item	91041
KEYWORD	analysis, chi, combination, comparison, confidence, data, deviation, dispersion, distribution, f, fisher, fit, goodness, normal, probability, program, ratio, sample, squared, standard, statistics, student, t, test, variance
ISBN	0 85679 803 7
ABSTRACT	ESDU 91041 explains the analysis of samples of less than 30 to predict the behaviour of the population. The analysis includes the prediction of mean values, standard deviations, percentiles and coefficients of variation. Also included is a method for comparison of samples which is particularly useful if it can be used to show two small samples may be combined into one larger sample so improving the accuracy of predictions. It is also useful when comparing the influence of design changes. Tables of the required statistics are included and equations are provided that allow less commonly used statistics to be estimated to an acceptable engineering accuracy. A fully worked example illustrates the major facets of the analysis of small samples. A Fortran program, ESDUpac A9141, is provided on disc in the software volume both as source code and compiled to run within ESDUview, accessible under MS DOS. It accepts a sample and outputs the mean and the standard deviation; it also performs a goodness-of-fit test to a chosen significance level. It then calculates, to chosen confidence levels, the population mean and standard deviation, a chosen population percentile and the population coefficient of variation.