## Some applications of statistical sampling methods to outgoing letter mail characteristics |

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### Contents

General introduction | 7 |

Letter size and color characteristics | 16 |

Ratio of hand canceled to machine canceled mail | 97 |

2 other sections not shown

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### Common terms and phrases

addressed envelope based on data bottom Clearance Space Bulk mail Cancel Long mail Cancel Short Air Cancel Short Regular combined data confidence coefficient 95 confidence limits Control charts Cull Air mail Cull mail Cumulative percentage curves curves for Height data from S.F. designated Height designated Length designated Thickness Frequency f Height and Length histograms for Length Interval in Inches Kolmogorov-Smirnov test L.A. combined Length of Cancel letter size characteristics limits for 90 limits with confidence line of intelligence lower and upper Lower Tolerance Limit machine canceled mail mail at S.F. mail by Bundles mail by Letters mail for combined Metered mail Predicted lower Regular Air Mail Regular and Cancel Relative frequency histograms relative frequency r.f. rH rH rH sample distributions Short Air mail Short and Cancel Short letters Short mail simple random sample statistical sampling Thickness of Cancel top clearance space Total Sample type of mail upper limits Upper Tolerance Limit Washington