Publisher's Synopsis
Manual 7A was developed to assist the reader in the development of supportive data and analysis when preparing standard test methods, specifications, and practices. It provides the latest information regarding statistical and quality control methods and their applications. This is the seventh revision of a popular manual first published in 1933 as STP 15 and is an excellent teaching and reference tool for data analysis and compliments work needed for ISO quality control requirements. PART 1 discusses frequency distributions, simple statistical measures, and the presentation in concise form, of the essential information contained in a single set of n observations. PART 2 examines the problem of expressing + limits of uncertainty for various statistical measures, together with some working rules for rounding-off observed results to an appropriate number of significant figures. PART 3 covers the control chart method for the analysis of observational data obtained from a series of samples, and for detecting lack of statistical control of quality.;Manual 7A has been updated and includes: * Discussions in the areas of whole number frequency distributions, empirical percentiles, and order statistics. * Additional material focusing on the idea of risks involved in the decision-making process based on data; and tests for assessing evidence of nonrandom behavior in process control charts. * The use of the s(rms) statistic has been minimized in favor of the sample standard deviation to reduce confusion as to their use.
