تبلیغات
دانشگاه علوم وفنون مازندران مهندسی صنایع - توزیع خی دو
 
دانشگاه علوم وفنون مازندران مهندسی صنایع
موفقیت یعنى سازگارى با حوادث روزگار
                                                        
درباره وبلاگ

مدیریت وب سایت:
مهندس محمد جواد مهدوی
کارشناس برنامه ریزی و کنترل پروژه (با استفاده از
نرم افزارهای primavera&Microsoft Project)
کارشناس مدیریت ریسک پروژه (با استفاده از نرم افزار permaster)
کارشناسی:مهندسی صنایع – برنامه ریزی و تحلیل سیستمها
دانشگاه علوم و فنون مازندران
کارشناسی ارشد: مهندسی صنایع - صنایع
دانشگاه آزاد قزوین
----------------------------------------------------
Engineer Mohammad Javad Mahdavi
Expert:Project Planning & Control
(Oil & Gas & Construction Projects)
Email : Mohammadjavad.mahdavi@yahoo.com
Web Site : http://mjm0123.mihanblog.com
مدیر وبلاگ : محمد جواد مهدوی
نظرسنجی
شما آینده کاری کدام یک از رشته های زیر را در رشته ریاضی فیزیک بهتر میدانید؟(در صورتی که رشته ی دیگری را مد نظر دارید گزینه سایر رشته ها را انتخاب کنید یا به ما اعلام نظر کنید تا در لیست نظر سنجی قرار دهیم.)











آمار وبلاگ
  • کل بازدید :
  • بازدید امروز :
  • بازدید دیروز :
  • بازدید این ماه :
  • بازدید ماه قبل :
  • تعداد نویسندگان :
  • تعداد کل پست ها :
  • آخرین بازدید :
  • آخرین بروز رسانی :
شنبه 13 اسفند 1390 :: نویسنده : محمد جواد مهدوی
این توزیع حالت خاصی از توزیع گاما است

تابع چگالی احتمال

این هم شکل تابع چگالی احتمال است

که Γ  همانا مشخصات تابع گاما است

تابع توزیع تجمعی

کهدر تابع گاما دو تعریف داریم

و همچنین در تعریف P(k,z) در توزیع گاما داریم

مشخصه تابع کای دو

 

شباهت با نرمال

اگر که     انگاه k متمایل است به  نرمال  بودن اگرچه این گرایش به کندی صورت می پزیرد 

چولگی ان به صورت   است و درجه اوج ان در یک نمودار اماری (مد) بیشتر از 12 / k است

و دو دگرگونی یا تغییر شکل که با اندیشه صحیح مطرح میشود که هر کدوم از این رهیافت های نرمال سریع تر از X که فیشر بطور غیر علمی ان را با  نشان داده از روی ازمایش و کار البته!

که تقریبا توزیع نرمال با میانگین و واریانس واحد است

که ممکن است موفق بشود در تخمین نتیجه نرمال یکسان

برای دیدن این مطلب چطوره که توجه کنید به میانگین و واریانس  توزیع کایدو با با متغیر تصادفی

که از ان داریم    

 

و 

 

که این  نان دهنده تابع گاما است

 نسبت خاصی از تابع گاما در μz

 

وقتی که  این نسبت خاص را با فرمول زیر تخمین می زنیم

و این به سادگی نشان می دهد که

و دوباره این هم نشان می دهد که

اقایان ویلسون و هیلتفلتری در سال ۱۹۳۱ نشان دادن که که   تخمینی از توزیع نرمال با میانگین 1 − 2 / (9k) و واریانس  2 / (9k).

که مقدار مورد انتظار از متغیر تصادفی دارای توزیع کایدو با  k  درجه آزادی و واریانس 2

و میانه با این راه تخمین زده میشود

 

اطلاعاتی در مورد درگاشت (انتروپی )

که

است

رابطه توزیع ها

 توزیع نمایی است اگر   


  داری توزیع کایدو است اگر     برای  


اگر که         دارای میانگین غیر صفر          نشان دهنده توزیع غیر مرکزی از کایدو است


توزیع کای دو  با      نوع خاصی از توزیع گاما با  


        اگر که      با     و    


   اگر که      در جاییکه      و مستقل و

اگر که X  داری توزیع کایدو باشه همانا  دارای توزیع کایدو با تاخیر است


توزیع تجمعی کایدو

 

ویژگیها

محدوده توزیع 

تابع مولد گشتاور     برای





نوع مطلب : مهندسی صنایع، 
برچسب ها :
لینک های مرتبط :




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