Question
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  1. Let be a r.v.; where ;and . Find
    and ?

Ask by Rojas Martinez. in Jordan
Jan 16,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

المتوسط ( ) هو 0.714، والانحراف المعياري ( ) هو حوالي 0.159.

Solution

لحساب المتوسط ( ) والانحراف المعياري ( ) للمتغير العشوائي الذي يتبع توزيع بيتا ، نبدأ بمقارنة دالة الكثافة المعطاة مع الشكل العام لدالة كثافة توزيع بيتا.
دالة الكثافة المعطاة:
لـ
الشكل العام لدالة كثافة توزيع بيتا:
لـ
حيث هو دالة بيتا.
بمقارنة الأسس أمام و :
لذلك:
الآن نحسب المتوسط والانحراف المعياري باستخدام معادلات توزيعة بيتا:
  1. المتوسط ( ):
  1. التباين ( ):
  1. الانحراف المعياري ( ):
النتائج النهائية:

Answered by UpStudy AI and reviewed by a Professional Tutor

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Simplify this solution

Beyond the Answer

To find the mean and standard deviation of a random variable that follows the Beta distribution with parameters and , we first need to identify the parameters from the provided probability density function .
The Beta distribution has the following properties for the mean and variance:
  1. The mean is given by:
  2. The variance is given by:
From the function , we can see that it is proportional to the Beta distribution. To express in the Beta function form, we note that it matches where and , since it can be represented as:
for .
Taking and :
  1. Mean :
  2. Variance :
    Thus, the standard deviation .
To summarize:

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