Incorruptible
发表于 2025-3-23 13:33:42
Stratified Sampling,Therefore, apart from increasing the sample size, another possible way to increase the precision of the estimate could be to divide the population units into certain number of groups, such that the variability within the groups is minimum whereas it is maximum between the groups. Smaller samples cou
五行打油诗
发表于 2025-3-23 17:47:34
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刺穿
发表于 2025-3-23 20:39:43
Regression Method of Estimation,liary variable x which is correlated with the study variable y. As stated before, the ratio method of estimation is at its best when the correlation between y and x is positive and high, and also the regression of y on x is linear through the origin. In practice, however, it is observed that even wh
拒绝
发表于 2025-3-24 00:44:40
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B-cell
发表于 2025-3-24 04:56:54
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conjunctivitis
发表于 2025-3-24 08:13:13
Multistage Sampling,er sampling is generally economical, but it is usually less efficient than sampling of same number of ultimate units directly from the population. This is because the former strategy restricts the spread of the sample over the population. It can, therefore, be logically expected that, for a given nu
DEI
发表于 2025-3-24 12:02:18
Sampling from Mobile Populations,ion, natural selection, evolution, maintenance of many ., and so on. Unlike other populations considered in previous chapters, the sampling units in the wildlife populations do not remain fixed at one place. They are rather highly mobile. Therefore, for mobile populations, it is essential to use alt
CURB
发表于 2025-3-24 16:38:59
Nonresponse Errors,at the true values of the variables of interest could be made available for the elements of the population under consideration. However, this is not usually the case in practice. The errors can occur at almost every stage of planning and execution of survey. These errors may be attributed to various
Ostrich
发表于 2025-3-24 22:13:20
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正面
发表于 2025-3-25 02:00:52
Collection of Survey Data, observations are used to test different theories and hypotheses. Various social and economic investigations are carried out through the use and analysis of relevant data. The data collected and analyzed in an objective manner and presented suitably serve as basis for taking policy decisions in different fields of daily life.