Search or add a thesis

Advanced Search (Beta)
Home > Generalized Mean Estimators for Sensitive and Non-Sensitive Variables in the Presence of Measurement Errors.

Generalized Mean Estimators for Sensitive and Non-Sensitive Variables in the Presence of Measurement Errors.

Thesis Info

Access Option

External Link

Author

Khalil, Sadia

Program

PhD

Institute

National College of Business Administration and Economics

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Statistics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/11103/1/Sadia%20Khalil_Stat_2018_NCBAE_PRR.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726260377

Similar


In survey research, accurate collection and recording of information is very critical. The researcher must deal with many potential problems. First the response rate may be poor due to various reasons such as poorly prepared survey instrument, poor execution of survey, survey questions being very personal in nature, and untrained field workers. Some of these issues lead to measurement errors which are the most common form of non-sampling errors. More formally, these errors are defined as the difference between the true value of a variable and its recorded value. It is for this reason these errors are also known as observational errors. Measurement errors have been studied by various authors with Cochran (1963) drawing early attention to these errors. While mean estimation for nonsensitive variables has been studied extensively in the presence of measurement errors, no attempt has been made to study mean estimation for sensitive variables in the presence of measurement errors. By sensitive variable, we mean a variable for which there is a natural tendency on the part of survey respondent to either refuse to answer or to give a socially desirable answer as opposed to correct answer. Randomized Response Technique (RRT) introduced originally by Warner (1965), and later refined by many researchers, is a great tool to deal with the problem of social desirability bias in surveys involving sensitive questions. The main focus of this thesis is on introducing a generalized mean estimator for non-sensitive as well as sensitive quantitative variables in the presence of measurement errors, and on studying the impact of measurement errors on mean estimation. In Chapter 1, we have provided a brief discussion about measurement errors, sensitive variables, and various versions of the Randomized Response Techniques (RRT). Furthermore, measurement errors under simple random sampling and stratified random sampling have been illustrated. Greater details on these two important topics, measurement errors and randomized response methodology, are provided as part of literature review in Chapter 2. In Chapter 3, we have reviewed some existing mean estimators for non-sensitive and sensitive study variables in the presence of measurement errors under both sampling designs. The major contributions of this thesis start from Chapter 4. In this chapter, a generalized mean estimator for a non-sensitive study variable under simple random sampling design has been proposed to examine the impact of measurement errors on mean estimation. Some special cases for generalized mean estimator have also been discussed. In Chapter 5, we continue the study undertaken in Chapter 4 but in the context of the stratified random sampling design. Chapters 6 and 7 are very important chapters where we have examined the impact of measurement errors on mean estimation of a sensitive study variable under the simple random sampling design and the stratified random sampling design respectively. We have used extensive simulations and numerical examples to validate our theoretical findings. Finally some concluding remarks with some possible future directions are mentioned in Chapter 8.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

پروفیسر علی محمد خسرو

پروفیسر علی محمد خسرو
سخت افسوس ہے کہ ۲۴؍ اگست کی شب میں ساڑھے گیارہ بجے مشہور مسلم دانشور، ملک کے ممتاز ماہر اقتصادیات اور علی گڑھ مسلم یونیورسٹی کے وائس چانسلر اور چانسلر پروفیسر سید علی محمد خسرو نے داعی اجل کو لبیک کہا، اناﷲ وانا الیہ راجعون۔
۷؍ اگست کو دل کا شدید دورہ پڑا تو اسپتال میں داخل کیے گئے لیکن مرض بڑھتا گیا اور آخر دنوں میں حالت اتنی خراب ہوگئی تھی کہ خود سے سانس نہیں لے سکتے تھے اور آلہ تنفس کا سہارا لینا پڑا بلڈپریشر بہت لو ہوگیا تھا بالآخر ۷۹ برس کی عمر میں وقت موعود آگیا، پس ماندگان میں ایک صاحبزادے اور ایک صاحبزادی ہیں۔
۲۵؍ اگست کو غالب اکیڈمی بستی حضرت نظام الدین کے قریب عرس محل میں عصر بعد نماز جنازہ ادا کی گئی اور درگاہ عمادالدین فردوسی کے پاس خسر و باغ میں تدفین ہوئی۔
موت تو ہر ایک کو آنی لابد ہے لیکن خسرو صاحب کی موت ایک بڑا قومی و ملی سانحہ ہے، وہ ملک کے مایہ ناز فرد، قومی اہمیت کے حامل اور زرعی و مالی اقتصادیات میں عالم گیر شہرت کے مالک تھے اور جس ملت سے ان کا تعلق تھا اس میں بڑا قحط الرجال ہے، اس کے یہاں جو جگہ خالی ہوتی ہے وہ پر نہیں ہوتی، خسرو صاحب جیسے بلند پایہ، عالی دماغ، کامل الفن اور یگانہ شخص کی خالی جگہ بھی پر ہوتی نظر نہیں آتی۔
سید علی محمد خسرو کا تعلق حیدر آباد کے ایک ممتاز خاندان سے تھا، وہ یہیں ۱۹۲۵؁ء میں پیدا ہوئے تھے، مدرسہ عالیہ اور نظام کالج سے فارغ التحصیل ہونے کے بعد لندن چلے گئے اور لیڈز یونیورسٹی سے معاشیات میں ایم۔اے اور پی۔ایچ۔ڈی کیا، وطن واپس آنے کے بعد عثمانیہ یونیورسٹی میں درس و تدریس کی خدمت انجام دی،...

پاکستان کے مشترکہ خاندانی نظام میں رہائش سے متعلقہ مسائل اور ان کا حل (اسلامی تعلیمات کی روشنی میں ایک جائزہ) Issues of Accommodation in the joint family system of Pakistan and their solution (An analytical study in the context of the Islamic teachings)

A family is the fundamental unit of society. Every society has the presence of a family. The start of a family's life is entirely dependent on matters of co. human relations. All such human relationships are entrenched in islamic sharia as a sacred bond of nikah, in which a husband and wife become a part of the world in the form of a family's collective result. Husband and wife are the most fundamental pillars of society, and their affection and companionship provides a source of stability for them and also a refuge for coming generations.A  family consist of husband ,wife and their children . The family life is begins with marriage, after marriage every woman wants to have her own separate home where all the requirements of privacy are met. Islam has placed the entire responsibility of livelihood on men..But in our society there are two types of family system joint and separate family system. In Pakistan The joint family system is prevalent. The people of the subcontinent are not only adopting this system but they are  also feel proud of it . In the present article the joint family  system has facing many challenges. One of them is accommodation. In this article will focus on  what is the basic concept of accommodation in joint family systems and its solution in Islami teachings. It is critical for the husband and wife to have a home where no one can  interfere on their personal matters. This interference is very much in our society.Which husband and wife facing many  problems. And due to this conditions, the relationship of husband and wife is also affected. Key Words: Joint family system, Issues of Accommodation, Pakistani society, Islamic teachings.

Insecticide Resistance Management of Tomato Fruit Borer, Helicoverpa Armigera Hübner Lepidoptera Noctuidae Heliothinae , Employing a Bio-Intensive Integrated Pest Management Strategy

The study was conducted on the insecticide-resistance-management of the tomato fruit-borer, Helicoverpa armigera (Hübner), employing a bio-intensive integrated management strategy on the tomato crop during 2007 and 2008, at Faisalabad (Punjab), Pakistan. The study comprised of the following four sections: 1. 2. 3. 4. Host Plant Resistance, Role of weather factors in the population fluctuations, Contribution of physio-morphic and chemical plant-characters, in the population fluctuation of the pest, and the Bio-intensive management of H. armigera on tomato crop. Thirty two genotypes of tomato, viz., Tropic Boy, Royesta, Long Tipped, Money- Maker, Ebein, NARC-1, Roma VFN, Pant Bahr, Shalkot-96, Chico-III, Tommy, Nagina, Peelo, Pusba Rubi, Sun-6002, FS-8802, FS-8801, Tanja, Pomodoro, Rio-grande, Rockingbam, Manik, Nadir, Early Mecb, Roma Local, Big Long, Gressilesse, Pakit, Tropic, Nova Mecb, Sahil and Red Top were screened for their resistance against the tomato fruit-borer, Helicoverpa armigera (Hübner.), during 2007. Maximum larval-population and percent infestation of the fruits were observed on Roma VFN, while these were found to be minimum on Sahil. Significant difference was observed among the genotypes, regarding the marketable fruit-yield in kg/plot. Roma VFN (a susceptible genotype), showed a minimum yield of 39.50 kg/plot; while, maximum yield of 99.56 kg/plot, was recorded on Sahil (a resistant genotype). Maximum, minimum and temperatures, each had significant and highly positive correlation with the fruit-infestation; whereas, the relative humidity showed a negative and significant correlation (P < 0.05) during the year 2008, while, during 2007, as well as on the basis of an average for both years, all the factors showed a non-significant correlation with the infestation. Various physio-morphic (hair-density and length of hair on the upper and lower surfaces of the leaves, and thickness of the leaf-lamina) and chemical plant characters (Moisture, total minerals, N, P, K, Ca, Mg, Fe, Mn, Zn, Fat, Crude fiber and CHO) were studied on various selected genotypes of tomato, to determine their effect on the larval- population of the fruit-borer and its infestation of fruits, during 2008. Hair-density on the upper-surface, length of hair on the upper-surface and the thickness of leaf-lamina showed a negative and significant correlation with the larval-population of tomato fruit- borer. Moisture percentage, P, Ca, Mg, Mn and Zn contents exerted a positive and significant correlation with the fruit-infestation; whereas, the effect was negative and significant between the Fe-contents and fruit-infestation. Thickness of the leaf-lamina and moisture percentage in the leaves of tomato plant were the most important and contributed the maximum in the larval-population of tomato fruit-borer, i.e., 16.8 and 35.8 percent, respectively followed by the hair-density on the upper surface of the leaves and CHO with 15.9 and 10.4 percent contribution in the larval population fluctuations of the tomato fruit-borer, respectively. The study was conducted to integrate various control methods, viz., biological control (release of Chrysoperla carnea and Bracon hebetor, each @ 1 card/5-m 2 ), botanical control (spray of neem-seed kernel extract, Neemosol @ 1480 ml/ha), chemical control (spinosad, Tracer 240 SC @ 197.6 ml/ha) and entomopathogenic fungal control (Bacillus thuringiensis @ 2 kg/ha) alone and in all of their possible interactions for the management of Helicoverpa armigera, on the tomato crop, during 2008. These control methods were applied three times on the tomato crop (CV Sahil), after the appearance of the pest. An Integration of B. thuringiensis + tracer + B. hebetor + neemosol and C. carnea, resulted in a maximum yield (305.92 q/ha), lowest larval population of H. armigera and minimum infestation of marketable tomato fruits caused by the pest. This treatment, as such, proved to be the best.