## Statistical methods in research and productionFrequency distribuitions; Averages and measures of dispersion; Statistical inference; Statistical tests: choosing the number of observations; Analysis of variance; Linear relationships between two variables; Multiple and curvilinear regression; Frequency data and contigency tables; Control charts; Sampling and specifications; Simulation; Statistical and mathematical symbols; Tables and charts of statistical functions. |

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### Contents

Introduction | 1 |

Frequency Distributions | 9 |

Averages and Measures of Dispersion | 30 |

Copyright | |

11 other sections not shown

### Common terms and phrases

abrasion loss accepted Analysis of Variance applied approximately arithmetic mean batch calculated Chapter chemical CN CN confidence limits control charts control limits correlation corresponding cumulative sum cusum defective articles degrees of freedom denote dependent determined double-sided effect error variance estimate example experiment Figure formula frequency functional relationship given groups independent variables inspection large number linear mean square mean value measure method multiple regression Normal distribution Null Hypothesis number of defective number of degrees number of observations obtained parameters plant plotted points Poisson distribution Population power curve precision prior distribution probability problem procedure proportion quantity range ratio raw material regression analysis regression coefficients regression equation rejected residual sample averages scheme Shewhart significance simulation slope sources of variation specification squares due standard deviation standard error statistical sub-groups sum of squares tensile strength tinctorial strength tion total number usually zero