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BASES PROOF FOR PERIOD (1.1) FOR CORRELATION CONEFFICIENT
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مفهوم معامل الارتباط كمقياس يربط بين متغيرين هذا يجلب انتباهنا إلى موضوع الإحصاء في كل المستويات. أكثر من ذلك هناك ثلاث نقاط خاصة هي اعتيادياً نشدد عليها كما يأتي:-

(1 معامل الارتباط هو الدليل المعياري والذي قيمته لا تعتمد على قياسات  

    المتغيرات الأصلية.

 (2قيمته تقع في المدى] 1,1-[ .

 (3أن مربع قيمته نصف نسبة تقليل في أحد المتغيرات بينما الآخر يبقى ثابتاً.

ولو أن هذه الخواص هي على نحو مستقيم ولو أن فئات رياضية من الطلاب           ]أنظر: Mendenhall et.al.1981, chap-5 [هم غالباً يعتقدون كحقيقة

في مقدمة كثير من المواضيع خصوصاً تلك التي توجه الى الحقول التي أحصائياً هي التي تطبق.

نسبة إلى تلك الخلفية، الغرض في هذا البند هو اشتراط أساسي لبرهان أن معامل الارتباط يقع في الفقرة ] 1,1-[ بواسطة العمل مع تباينات جمع وفرق متغيرين عشوائين معيارين.

هكذا مناقشة تشترط طريقة توصل الخواص المشتركة لمعامل الارتباط

لغرض المستمعين من الطلاب.

بعض الدلالة لأجل انحدار خطى يتم إحضاره كوصف قانون معامل الارتباط لمقياس لإنقاص نسبة أمكانية التحويل.

 

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Publication Date
Sat Jun 27 2026
Journal Name
Journal Of Baghdad College Of Dentistry
Assessment of serum Interleukin-1β and its correlation with periodontal health status during pregnancy
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Background: Pregnancy is a stressful state of increased inflammatory activity, and pregnancy – associated hormone changes can influence periodontal tissues, these inflammatory activity lead to production of inflammatory mediators. Interleukin 1 beta (IL-1β) is a potent pro-inflammatory cytokines that is consistently associated with periodontal diseases. This study was designed to determine the periodontal health status and detect the serum level of IL-1β in the healthy pregnant women at first, second and third trimester and compare it with healthy non pregnant women, and determine its correlation with different clinical periodontal parameters. M

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Publication Date
Sat Sep 03 2022
Journal Name
International Journal Of Health Sciences
Correlation between oxidative stress and clopidogrel drug in Iraqi patients with coronary artery disease
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Background: Coronary Artery Disease (CAD) is one of the largest causes of mortality worldwide. Clopidogrel, antiplatelet drug, has been widely used for management of CAD. The current study aimed to investigate the effect of clopidogrel on the oxidative stress in CAD patients. Methods: One hundred CAD patients, who were followed-up for 5 days after receiving clopidogrel, and 50 healthy volunteers were included in this study. Parameters include catalase (CAT), total antioxidant capacity (TAC), total oxidant capacity (TOC), total protein, albumin, and globulins were determined before and after treatment with clopidogrel. Results: CAT, TAC, and Tp were significantly decreased (P<0.0001) in CAD patients compared to healthy control and

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Publication Date
Thu Aug 01 2024
Journal Name
Al-kindy College Medical Journal
The Correlation of Serum Periostin Level with Disease Severity in Patients with Covid -19
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Background: Coronavirus disease 2019 (COVID-19) is an emerging zoonotic disease caused by the new respiratory virus SARS-CoV2. It has a tropism in the lung tissues where excess target receptors exist. Periostin plays a role in subepithelial fibrosis associated with bronchial asthma. Since the Coronavirus's target is the human respiratory system, Periostin has been recently described as a valuable new biomarker in the diagnosis and evaluation of disease in patients with COVID-19 lung involvement. Objectives: To assess the level of Periostin in the serum of COVID-19 patients and to correlate its role in disease severity and prognosis. Subjects and Methods: Periostin serum levels were measured for 63 patients attending three main COVID

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Publication Date
Fri Mar 01 2013
Journal Name
Journal Of Economics And Administrative Sciences
Comparison for estimation methods for the autoregressive approximations
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Abstract

      In this study, we compare between the autoregressive approximations (Yule-Walker equations, Least Squares , Least Squares ( forward- backword ) and Burg’s (Geometric and Harmonic ) methods, to determine the optimal approximation to the time series generated from the first - order moving Average non-invertible process, and fractionally - integrated noise process, with several values for d (d=0.15,0.25,0.35,0.45) for different sample sizes (small,median,large)for two processes . We depend on figure of merit function which proposed by author Shibata in 1980, to determine the theoretical optimal order according to min

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Publication Date
Sat Jun 01 2019
Journal Name
Journal Of Economics And Administrative Sciences
Freedom of movement of capital and its impact on the effectiveness of monetary policy In Iraq (2005-2016)
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The interest in the issue of capital movement as an economic phenomenon has increased because of its effects and effects and its ability to influence the economic balance and the effectiveness of monetary policy. All countries seek to attract capital and benefit from it because of its effects and results such as supporting economic development process and optimal allocation of economic resources. The problem of the financing gap that most countries suffer from, and others, but sometimes the movement of capital creates challenges for monetary policy makers in achieving their goals.

   After 2003, the Iraqi economy witnessed an openness and economic liberalization unlike previous years, which

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Publication Date
Fri Jun 01 2012
Journal Name
Journal Of Economics And Administrative Sciences
Public Budget and the Roles of Legislative and Executive Power Regarding It with Reference to Iraq)2004-2011)
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The public budget is regarded a main tool for economic and social development. The preparation of the public budget constitute an important stream which enriches the developmental efforts and the definition of its priorities, therefore it is the focus point of many specializations. The public budget has numerous functions. It is a means to precise and to execute the political and economic goals of the executive authority, a mirror of the economic structure which reflects its strength and weakness points, specifies its revenues and others. Since the parliament is the voice of the society which expresses its interests, then, it must monitor the performance of the government so that the participation of the legislative authority in

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Publication Date
Wed Oct 24 2018
Journal Name
Journal Of Planner And Development
تحديد مقترحات لحل مشكلة السكن العشوائي دراسة تحليلية لمدينة بغداد للفترة من 2003-2008
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Publication Date
Sun Apr 01 2018
Journal Name
Journal Of Economics And Administrative Sciences
أسس تسوية مطالبات التأمين البحري دراسة حالة: سوق التأمين السوداني (للفترة 2005 - 2009 م)
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This research reviews the basis for the settlement of claims when marine losses occur, including the settlement of claims in the case of joint maritime losses for goods and ship objects, as well as the settlement of claims for damage to vessel objects when they are at sea risk and loss   during the sea voyage.   Construction

    The Research used descriptive, analytical and historical methods in preparing the research; the society of study composed of the employee in the insurance companies working in Sudan, the questionnaire was distributed for all study samples.  The study concluded some important results of which it is , there is a weak of awareness, and lack of

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Publication Date
Wed Mar 10 2021
Journal Name
Baghdad Science Journal
Develop Bactra system to determine Mutagens in the Environment, Food III: use emulators nitrogenous bases 5 - Bromeuruasil
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The results show that the compound affects the rest of the living cells after treatment for 15 minutes The influence Almtafr has had the effect BU less than the effect of NTG in the case of the registration of every of Struptomaysan resistance and rifampicin, although the first attribute more responsive

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Publication Date
Wed Apr 12 2017
Journal Name
Ibn Al-haitham Journal For Pure And Applied Science
Synthesis and Characterization New Schiff Bases, Pyrazole and Pyrazoline Compounds Derived From Acid Hydrazide Containing Isoxazoline Ring
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The work involves synthesis of new Schiff bases ([V] a, b and [VI] a, b), pyrazoles [VII] a, b and pyrazolines [VIII] a, b derivatives containing isoxazoline unit starting with chalcones. 4-bromoacetophenone was reacted with 4-hydroxybenzaldehyde or 4-hydroxyacetophenone was reacted with 4-bromobenzaldehyde in basic medium to give chalcone by Claisen-Schemidt reaction. The chalcons [I] a, b was reacted with hydroxylamine hydrochloride to form isoxazolines [II] a, b. which were reacted with ethyl chloro acetate in basic medium to get ester compounds [III] a, b. The condensation new ester [III] a, b with hydrazine hydrate80% yieldedacid hydrazide [IV] a, b. The later compound refluxing with 4-substituted benzaldehyde in dry benzene to give Sc

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