In order to investigate the degree of accuracy of hanging scales (maximum capacity of 4kg and minimum graduation of 50g) that were used in The National Nutrition Survey conducted on May 1967, housewives of 34 sampled households in the Setagaya Health Center jurisdiction and nutritionists measured 15 varieties of different weight using 34 scales.
Mean, bias, mean square, standard deviation, coefficient variation, confidence limit, and nutritive quantity were calculated.
Summary of findings were as follows.
1. Error was large when these scales were used for weighing light items.
2. Weighing by the sampled housewives were inaccurate than the weighing by the Health Center nutritionists.
3. Variation of nutritive value calculated from the data using these scales was assumed to be largely depending on the kinds of food.
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