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Search Results: 1 - 10 of 7064 matches for " Muhammad Qaiser Shahbaz "
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Modeling Barley Production in Punjab
Muhammad Bilal,Muhammad Qaiser Shahbaz
Pakistan Journal of Statistics and Operation Research , 2008, DOI: 10.1234/pjsor.v4i1.58
Abstract: Barley has been an important commodity of the country. In this paper Forecast model for production of Barley in Punjab has been fitted. Methodologies for fitting of the model has been used these include ARIMA model. Diagnostic test has been carried out to see the adequacy of fitted models. Forecasted production has been obtained for coming five years.
Comparison of Negative Moment Estimator with Maximum Likelihood Estimator of Inverse Rayleigh Distribution
Muhammad Mohsin,Muhammad Qaiser Shahbaz
Pakistan Journal of Statistics and Operation Research , 2005, DOI: 10.1234/pjsor.v1i1.115
Abstract: In this paper, method of negative moments has been used to estimate the parameter of Inverse Rayleigh Distribution. The asymptotic variance to the parameter estimates has been obtained. A comparison have been made between the variance of Maximum Likelihood Estimate and the variance of negative moment of first order for Inverse Rayleigh Distribution.
A New Approximate Formula for Variance of Horvitz–Thompson Estimator using first order Inclusion Probabilities
Muhammad Qaiser Shahbaz,Muhammad Hanif
Pakistan Journal of Statistics and Operation Research , 2007, DOI: 10.1234/pjsor.v3i1.78
Abstract: A new approximate formula for sampling variance of Horvitz–Thompson (1952) estimator has been obtained. Empirical study of the approximate formula has been given to see its performance.
A CHARACTERIZATION OF ERLANG-TRUNCATED EXPONENTIAL DISTRIBUTION IN RECORD VALUES AND ITS USE IN MEAN RESIDUAL LIFE
Muhammad Mohsin,Saman Shahbaz,Muhammad Qaiser Shahbaz
Pakistan Journal of Statistics and Operation Research , 2010, DOI: 10.1234/pjsor.v6i2.148
Abstract: In this paper the Erlang-truncated exponential distribution is characterized by the conditional expectation of record values. The utility of our result is demonstrated in mean residual life by using this characterization.
Stability of Variance Estimator of Modified Murthy Estimator
Muhammad Qaiser Shahbaz,Mariyam Hafeez
Pakistan Journal of Statistics and Operation Research , 2007, DOI: 10.1234/pjsor.v3i2.63
Abstract: Stability of the estimator of sampling variance is very important in using the estimator for estimation of sampling variance. In this paper the stability of the estimator of sampling variance of Modified Murthy (1957) estimator given by Shahbaz (2004) has been carried out by using the super population model.
A Comparative Study of Generalized Ratio and Regression Estimators with their classical counterparts
Younathan Abdia,Muhammad Qaiser Shahbaz
Pakistan Journal of Statistics and Operation Research , 2006, DOI: 10.1234/pjsor.v2i1.88
Abstract: A comparative study has been made by using generalized ratio and regression estimators of Brewer, Horvitz and Thompson and Cassel-Sarandal and Wretman estimators. The study also involves ratio and regression estimators along with the mean per unit estimator of equal probability sampling. Ranking is being done to see which population total variances are performing the best.
Modeling the Accidental Deaths
Mariyam Hafeez,Muhammad Qaiser Shahbaz
Pakistan Journal of Statistics and Operation Research , 2008, DOI: 10.1234/pjsor.v4i1.57
Abstract: The model for accidental deaths in the city of Lahore has been developed by using a class of Generalized Linear Models. Various link functions have been used in developing the model. The diagnostic checks have been carried out to see the validity of the fitted model.
A CLASS OF WEIGHTED WEIBULL DISTRIBUTION
Saman Shahbaz,Muhammad Qaiser Shahbaz,Nadeem Shafique Butt
Pakistan Journal of Statistics and Operation Research , 2010, DOI: 10.1234/pjsor.v6i1.126
Abstract: The weighted Weibull model is proposed following the method of Azzalini (1985). Basic properties of the distribution; including moments, generating function, hazard rate function and estimation of parameters; have been studied.
The Kumaraswamy–Inverse Weibull Distribution
Muhammad Qaiser Shahbaz,Saman Shahbaz,Nadeem Shafique Butt
Pakistan Journal of Statistics and Operation Research , 2012, DOI: 10.1234/pjsor.v8i3.520
Abstract:
ANOVA with Summary Statistics: A STATA Macro
Nadeem Shafique Butt,Shahid Kamal,Muhammad Qaiser Shahbaz
Pakistan Journal of Statistics and Operation Research , 2006, DOI: 10.1234/pjsor.v2i1.87
Abstract: Almost all available statistical packages are capable of performing Analysis of Variance (ANOVA) from raw data. Some of statistical packages have capability to perform independent sample t-test, and some other tests of significance on summary data, but seldom would you come across a software that has the capability to perform ANOVA directly on summary data. However some packages can perform one-way ANOVA after generating surrogate data from summary statistics. In this short note we have given STATA program to perform one-way ANOVA on summary data; in addition this program also performs Bartllet’s tests of equality of variances. The idea can be extended to two-way and higher way ANOVA’s. Examples have been given for illustration.
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