而我们对1500名青年所作的抽样调查发现，称自己失业或认为自己失业的人的比例要高于这个数字，在35 - 40%之间。
Our survey of 1,500 youth found that the self declared or perceived jobless rate was even higher, at 35 to 40 percent.
布莱顿的人均瑜伽馆数量为其它抽样城市的2倍，城市居民的肥胖比例则低于全国平均水平。
It had twice as many yoga clubs per head than the other cities sampled, while the level of obese inhabitants is below the national average.
对简单随机不放回抽样，在总体非敏感属性个体比例未知的情况下，给出了两个子样本容量的最优配置。
Under simple random sampling scheme without replacement and unknown proportion of population possessing neutral attribute, the optimal allocation of sizes of two sub-samples is given.
本研讨以某农业大学为例，对该校在读大学生、已就业大学生、用人单位和某校等不同调查对象依照一定比例，采取随机抽样方式入行调研。
In this study, as an example of the students in an agricultural university, we made an investigation among students on campus, students employed, employers and the university mentioned above.
按15%和10%的抽样比例得到的核心库的方差差异百分率相等而高于25%抽样比例的方差差异百分率；
These percentage of variance difference through sampling at 15% and 10% were higher than that of through sampling at 25%.
方法问卷法、跨文化比较法及随机抽样调查，按各村18岁至45岁人口比例抽取样本。
Methods Applying answering questionnaires, contrasting cross culture and getting the sample at random. Then we chose each village came from 18 to 45 year-old sample.
结果表明，在抽样率为5%时，右转交通量理论比例与实际比例的最 大误差为9.16%。
Nanjing. From a 5% sample, the results show a discrepancy of 9.16% between ratios of theoretical and actual right turn volumes.
结果表明，在抽样率为5%时，右转交通量理论比例与实际比例的最 大误差为9.16%。
Nanjing. From a 5% sample, the results show a discrepancy of 9.16% between ratios of theoretical and actual right turn volumes.
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