|
Subject: Станадартное отклонение stat. Оценка повторяемости метода количественного определения (ионная хроматография)The repeatability at different level of concentration was compared to the repeatability at one level of concentration (0.6 g/L) using the F test:
F = SD1 в квадрате/ SD2 в квадрате
where:
SD1 = higher standard deviation found between the repeatability at one level of concentration and the standard deviation at five level of concentration,
SD2 = lower standard deviation found between the repeatability at one level of concentration and the standard deviation at five level of concentration. Непонятны два крайних предложения.
SD1 = ...........and the standard deviation at five level of concentration, здесь вместо the standard deviation должно быть the repeatability??
SD2 = ............ то же самое?? Заранее благодарен.
| 