ISO 7347:1987
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:
- 17 декабря 1987 г.
- Издание:
- ISO IS 7347 edition 1 version 1
- ICS:
- 77.100
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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