نتایج جستجو برای: sample designing
تعداد نتایج: 496599 فیلتر نتایج به سال:
BACKGROUND Random errors in measurement of a risk factor will introduce downward bias of an estimated association to a disease or a disease marker. This phenomenon is called regression dilution bias. A bias correction may be made with data from a validity study or a reliability study. AIMS AND METHODS In this article we give a non-technical description of designs of reliability studies with e...
A pilot study asks whether something can be done, should the researchers proceed with it, and if so, how. However, a pilot study also has a specific design feature; it is conducted on a smaller scale than the main or full-scale study. In other words, the pilot study is important for improvement of the quality and efficiency of the main study. In addition, it is conducted in order to assess the ...
The purpose of this article is sociological explanation of Iran's contemporary carpet designing system to recognizing of the evolution or the stability in its carpet designing schools. For this aim, first we selected and compared 20 sample carpets among the woven carpets of Tabriz and Esfahan in the past 10 years with the same number of Tabriz and Esfahan carpets that are woven at 40 to 60 year...
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