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accuracy analysis of variance apply approximation Asso assumed average bias biased binomial type blocks bus tires calculated chosen coefficient of variation comparison Confidence limits consider cost function dealers double sampling enumeration equal equation estimated mean example field finite population correction formula fron given gives Hence households Jessen Jour large sample large unit largo mean square methods of estimation negligible non-respondents normal distribution number of farms obtained optimum allocation percent population mean population total probability procedure proportional sampling quantity ratio estimate regression estimate rosult sample estimate sample mean Sample Surveys sampling error Sampling Methods sampling rate sampling unit Sanple selected simple random sample sizo Stat Statistical stratified random sample stratified sampling sub-units subsampling systematic sample Table taken taking the sample term th stratum th unit Theorem tho sample tho variance tion total number type of sampling unbiased estimate variation zero