’95全国弹簧软床垫质量分级检验结果统计分析

The Statistic Analysis of the Result of Classified Verification to Spring Mattress Quality in the Whole Country in 1995

本文运用数理统计方法对’95全国弹簧软床垫质量分级检验结果进行了分析,分析表明国内弹簧软床垫的弹簧覆盖率的总体概率属正态分布,尽管国家行业标准规定的合格指标是52%以上,但质量水平的中值69.7%更为合理,并已被市场接受。与弹簧覆盖率有一定关系的是弹性压缩量指标,其统计均值为31.8,标准差为11.8,说明软硬适中稍偏硬的床垫较符合用户的要求。

This article has used the method of mathematical statistical to analyse the result of classified verification of spring mattress quality in the whole country in 1995. The analysis shows that the general probability of spring covering rate of domestic spring mattresses is in normal distribution. Though the standard index provided in the state trade standard is over 52%, the medium value of quality level of 69. 7% is more reasonable . It has been accepted by markets. That related to the spring covering rate is the elastic compression value index. Its average statistic value is 31- 8 and its standard error is 11. 8. This shows that the mattresses which hardness is moderate but a bit harder is more suitable to users' requirements.