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TOC Introduction About the authors 1. Basic Statistical Concepts Random variables Population Parameters and Sample Estimates Standard Error of the Mean The normal distribution Conf idence Intervals Tolerance Intervals Non-normal Distributions and Testsof Normality Precision and Accuracy The Concept of Control Straight Line Fitting Propagation of Errors Sample Sizes and Compliance with Standards Transformation of Scale Presentation of Data and Significant Figures Tests of Significance Evaluation of Diagnostic Tests 2. Quality Control 3. The Control Chart Statistical Basis for the Control Chart Variability Between and Within Subgroups Types of Control Charts Preparing a Control Chart Computing Control Limits Control Chart for Individual Determinations Other Types of Control Charts Detecting Lack of Randomness Interpreting Patterns of Variation in a Control Chart The Control Chart as a Management Tool