## A combination statistical design for sensitivity testing |

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### Contents

Factorial experiments with explosives | 12 |

References | 18 |

Statistical analysis of data of experiment 3 | 24 |

### Common terms and phrases

12 comparisons 180-shot estimates 180-shot up-and-down sequences 20 shots 20-shot sequence 2Highly significant effect acceptably good estimates analysis of variance appendix average mean bagasse based on 20 Brownlee and coauthors Bureau of Mines Calculation of analysis calculations of data carbonaceous material coal mine explosives combination design COMBINATION STATISTICAL DESIGN compared Conclusions from testing Correction for mean critical charge weight data of table Degrees of freedom DESIGN FOR SENSITIVITY Dixon and Massey estimated by 20-shot Explosives Research Center factor factorial design factorial experiments firedamp freedom Mean squares given in table grams Variance incendivity items in row log units maximum ignitibility mean based mean of sequences natural gas normal curve replicates reproducibility samples SENSITIVITY TESTING sequences of 20 shorter sequences shown in figure sible explosives sodium chloride squares Degrees standard deviation Sum of squares table 9 three AN particle Total types of carbonaceous up-and-down method variance in data variance Sum W50 values obtained