sample-volume variance 中文意思是什麼
sample-volume variance
解釋
樣品體積方差-
Based on the port and waterway superintendence units, we study and screen the detailed method for the sample survey of whole industry waterway transportation volume, including selecting detailed sampling method, determining the appropriate sampling size, designing the calculation formula of all target estimators and their variance estimation
包括選定具體的抽樣方法,確定合適的樣本量,給出需估計目標量的估計公式及估計量的精度公式,制定詳細的樣本調查規定和編制科學合理的樣本調查表等。
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