SIST ISO 7347:2001 PDF
Ferroalloys -- Experimental methods for checking the bias of sampling and sample preparation
Ferroalloys -- Experimental methods for checking the bias of sampling and sample preparation
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 11
- Дата публикации:
- 1 ноября 2001 г.
- ICS:
- 77.100
- Технический комитет:
- IFEK - Ferrous metals
Applies to ferroalloys given in the relevant International Standards. Should be read in conjunction with ISO 3713, ISO 7087 and ISO 7373. Includes four annexes.
Abstract
Overview
ISO 7347:1987 - "Ferroalloys - Experimental methods for checking the bias of sampling and sample preparation" specifies statistical experimental procedures to check whether a sampling or sample‑preparation method introduces bias when determining quality characteristics of ferroalloys. The standard defines how to compare a with a using repeated experiments and statistical significance tests at the 5% level (two‑sided t‑test). It is intended to be used together with , and .
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