منابع مشابه
asymptotic property of order statistics and sample quntile
چکیده: فرض کنید که تابعی از اپسیلون یک مجموع نامتناهی از احتمالات موزون مربوط به مجموع های جزئی براساس یک دنباله از متغیرهای تصادفی مستقل و همتوزیع باشد، و همچنین فرض کنید توابعی مانند g و h وجود دارند که هرگاه امید ریاضی توان دوم x متناهی و امیدریاضی x صفر باشد، در این صورت می توان حد حاصلضرب این توابع را بصورت تابعی از امید ریاضی توان دوم x نوشت. حالت عکس نیز برقرار است. همچنین ما با استفاده...
15 صفحه اولHow useful are our present statistics on sexually-transmitted diseases?
Various aspects of the British statistics relating to sexually-transmitted diseases are examined. Defects in these are illustrated by data from a series of surveys. It is suggested that the information being collected and published is incomplete by an unknown amount, inadequate because it tells only of laboratory diagnoses, and unusable at a local level because it relates to no identifiable pop...
متن کاملThe Lack of Reproducibility in Research How Statistics Can Endorse Results
scientifi c investigation if subsequent attempts to validate those results had already failed. So what would happen to the name of science if it were discovered that many respected studies’ fi ndings were non-reproducible? We may be in the process of fi nding out. In a well-publicized coincidence, two pharmaceutical fi rms recently reported that they were only able to fully reproduce the peer-r...
متن کاملThe intravitreal Injection of bevacizumab:The review of Our Experience
Aim: Several ocular and systemic complications have been reported after the bevacizumab intravitreal injection. This study aims at reporting the main indications for the bevacizumab intravitreal injection in our center, the intravitreal injection method in this study, and the incidence of the post-injection complication, such as endophthalmitis.Methods: This study is a retrospective review of t...
متن کاملStatistics for dental researcher, Part 2: Descriptive statistics
Descriptive statistics is the process of summarizing gathered raw data from a research and creating useful statistics, which help the better understanding of data. According to the types of variables, which consist of qualitative and quantitative variables, some descriptive statistics have been introduced. Frequency percentage is used in qualitative data, and mean, median, mode, standard deviat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The ANNALS of the American Academy of Political and Social Science
سال: 1911
ISSN: 0002-7162,1552-3349
DOI: 10.1177/000271621103800115