What does "optimum population" mean? 来自 Semantic Scholar 喜欢 0 阅读量: 32 作者: DD Friedman 摘要: A weakness in the discussion of population policy for the last decade has been the almost total failure to seriously consider by what criterion alternative futures containing different numbers of...
What is the 95% confidence interval for a population mean with a known mean of 96, a known variance of 9, and with a number of observations of 400?A. 95.613 to 96.387.B. 95.706 to 96.294.C. 95.118 to 96.882. 正确答案:B 分享到: 答案解析: Because we can compute the population stan...
百度试题 题目1. Assuming that the population mean is 47.2 and the population deviation 6.4, what is the Zobt value for a sample mean of 52.1 if N= 8 A. 2.17 B. ,1.73 相关知识点: 试题来源: 解析反馈 收藏
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三、用于固定结构“What is the+抽象名词” 此时,what有“多少”的含义,例如:What is thepopulation of China?(=How many people are there inChina?) 四、用作语气词,表示感叹,意为“多么、何等” 例如:What happy children!(=How happy the childrenare!) 五、用作连词,含义和作用类似as muchas、the deg...
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But calculating the mean from the entire population might not be feasible. In such scenarios, a sample can serve as an estimate of the population. A sample will never perfectly mirror the population, because they are just a fraction of the population and so may not be representative of the ...
The population of this city is larger than that of that city. What does it mean? A. That city has more people. B. This city has fewer people. C. This city has more people. D. The two cities have the same number of people. ...
we also derived the mean among the whole sample, when AI prevalence was also reported. As very few studies reported measures of variance of intercourse act data, we were unable to conduct statistical synthesis of frequency data; thus, we limited our analysis to graphically exploring the effects ...
The population of this city is five times what it was ten years ago. What does it mean? A. 这个城市现在的人口是十年前的五倍。 B. 这个城市十年前的人口是现在的五倍。 C. 这个城市现在的人口比十年前多五倍。 D. 这个城市十年前的人口比现在多五倍。